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Full vulnerability report · 2026
CVE-2026-114125High confidence

Storybook: Missing origin validation in Storybook preview allows code injection from malicious websites

storybookjs · storybook

Official source article: GitHub GHSA-F2PH-CMG5-WXC8 ↗. Check the applicable product and release in the original source.

8.6HighCVSS 4.0
Recommended action
Patch only the product branches with a verified fix

High technical severity; prioritise exposed affected systems while verifying vendor guidance. Verified remediation exists for at least one product or source, but 10 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.

Fix availability varies by product
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityHighOperational priority:High, unchanged from published severity.unchanged

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • EPSS is 0.38% for the current model date.

Compensating controls

  • Validate the affected product branch and deploy the verified fixed release.
  • Restrict the affected network interface to trusted sources where business-safe.
  • Monitor vendor guidance and exploitation sources for a material change.

Verification

  1. Confirm that the asset runs storybookjs storybook and falls inside the recorded affected range.
  2. Verify the installed build against the product-specific fixed version after deployment.
  3. Validate exposure, authentication requirements and compensating controls in the actual environment.
  4. Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Mitigation target: Within 30 daysRemediation target: Within 180 days

This automated reassessment organises public evidence. It does not know asset exposure, business impact or control effectiveness and does not replace CVSS or a human risk decision.

Cross-source reconciliation

Remediation availability differs by product scope

Verified remediation exists for at least one product or source, but 10 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.

Open-source package ranges24 source-attributed ranges

These OSV and GitHub advisory ranges apply only to the named package and ecosystem. A listed fixed version is not a universal product patch or proof that an update is installed.

Ecosystem and packageAffected rangeFirst fixed versionEvidence
npm@storybook/addon-mcp>= 10.6.0, < 10.6.210.6.2GitHub advisory ↗upstream repository advisory · 21 Oct 2026
npm@storybook/addon-mcp>= 11.0.0-alpha.0, < 11.0.0-alpha.611.0.0-alpha.6GitHub advisory ↗upstream repository advisory · 21 Oct 2026
npm@storybook/addon-mcpSEMVER: introduced 10.6.0; fixed 10.6.210.6.2OSV record ↗aggregator derived · 21 Oct 2026
npm@storybook/addon-mcpSEMVER: introduced 11.0.0-alpha.0; fixed 11.0.0-alpha.611.0.0-alpha.6OSV record ↗aggregator derived · 21 Oct 2026
npm@storybook/addon-vitest>= 9.0.0, < 9.1.219.1.21GitHub advisory ↗upstream repository advisory · 21 Oct 2026
npm@storybook/addon-vitest>= 10.0.0, < 10.6.210.6.2GitHub advisory ↗upstream repository advisory · 21 Oct 2026
npm@storybook/addon-vitest>= 11.0.0-alpha.0, < 11.0.0-alpha.611.0.0-alpha.6GitHub advisory ↗upstream repository advisory · 21 Oct 2026
npm@storybook/addon-vitestSEMVER: introduced 9.0.0; fixed 9.1.219.1.21OSV record ↗aggregator derived · 21 Oct 2026
npm@storybook/addon-vitestSEMVER: introduced 10.0.0; fixed 10.6.210.6.2OSV record ↗aggregator derived · 21 Oct 2026
npm@storybook/addon-vitestSEMVER: introduced 11.0.0-alpha.0; fixed 11.0.0-alpha.611.0.0-alpha.6OSV record ↗aggregator derived · 21 Oct 2026
npm@storybook/core>= 8.0.0, < 8.6.198.6.19GitHub advisory ↗upstream repository advisory · 21 Oct 2026
npm@storybook/coreSEMVER: introduced 8.0.0; fixed 8.6.198.6.19OSV record ↗aggregator derived · 21 Oct 2026
npm@storybook/core-server>= 8.0.0, < 8.6.198.6.19GitHub advisory ↗upstream repository advisory · 21 Oct 2026
npm@storybook/core-serverSEMVER: introduced 8.0.0; fixed 8.6.198.6.19OSV record ↗aggregator derived · 21 Oct 2026
npm@storybook/experimental-addon-test>= 8.0.0, < 8.6.198.6.19GitHub advisory ↗upstream repository advisory · 21 Oct 2026
npm@storybook/experimental-addon-testSEMVER: introduced 8.0.0; fixed 8.6.198.6.19OSV record ↗aggregator derived · 21 Oct 2026
npmstorybook>= 8.0.0, < 8.6.198.6.19GitHub advisory ↗upstream repository advisory · 21 Oct 2026
npmstorybook>= 9.0.0, < 9.1.219.1.21GitHub advisory ↗upstream repository advisory · 21 Oct 2026
npmstorybook>= 10.0.0, < 10.6.210.6.2GitHub advisory ↗upstream repository advisory · 21 Oct 2026
npmstorybook>= 11.0.0-alpha.0, < 11.0.0-alpha.611.0.0-alpha.6GitHub advisory ↗upstream repository advisory · 21 Oct 2026
npmstorybookSEMVER: introduced 8.0.0; fixed 8.6.198.6.19OSV record ↗aggregator derived · 21 Oct 2026
npmstorybookSEMVER: introduced 9.0.0; fixed 9.1.219.1.21OSV record ↗aggregator derived · 21 Oct 2026
npmstorybookSEMVER: introduced 10.0.0; fixed 10.6.210.6.2OSV record ↗aggregator derived · 21 Oct 2026
npmstorybookSEMVER: introduced 11.0.0-alpha.0; fixed 11.0.0-alpha.611.0.0-alpha.6OSV record ↗aggregator derived · 21 Oct 2026
Direct vendor intelligence

Authoritative vendor CSAF and VEX advisories

Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.

2 current
CVE-2026-114125 · CSAF 2.0 · revision 3 · finalRed Hat Product Securitystorybook: Storybook: Arbitrary code execution via insufficient message-origin restrictions
5 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • workload-availability/node-healthcheck-must-gather-rhel9 as a component of Node HealthCheck Operator
  • workload-availability/node-healthcheck-operator-bundle as a component of Node HealthCheck Operator
  • workload-availability/node-healthcheck-rhel9-operator as a component of Node HealthCheck Operator
  • workload-availability/node-remediation-console-rhel8 as a component of Node HealthCheck Operator
  • rh-podman-desktop as a component of Red Hat Build of Podman Desktop
Summary
A flaw was found in Storybook. Due to insufficient iframe embedding and message-origin restrictions, a remote attacker can achieve arbitrary code execution if a developer running a local development server visits a malicious website. By tricking the developer into interacting with an injected interface, attacker-controlled events can reach the active preview and modify story files, resulting in code execution with the developer's privileges.
Remediation
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://images.redhat.com/
CVE-2026-114125 · CSAF 2.0 · revision 2 · interimSUSE Product Security TeamCVE-2026-114125
10 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • trento-web as component of SUSE Linux Enterprise Module for SAP Applications 15 SP4
  • trento-web as component of SUSE Linux Enterprise Module for SAP Applications 15 SP5
  • trento-web as component of SUSE Linux Enterprise Module for SAP Applications 15 SP7
  • trento-web as component of SUSE Linux Enterprise Server for SAP Applications 15 SP4
  • trento-web as component of SUSE Linux Enterprise Server for SAP Applications 15 SP5
  • trento-web as component of SUSE Linux Enterprise Server for SAP Applications 15 SP7
  • trento-web as component of SUSE Linux Enterprise Server for SAP applications 16.0
  • trento-web as component of SUSE Linux Enterprise Server for SAP applications 16.1
  • trento-web as component of openSUSE Leap 16.0
  • trento-web as component of openSUSE Leap 16.1
Summary
Storybook is a frontend workshop for building user interface components and pages in isolation. From 8.0.0 until 8.6.19, 9.1.21, 10.6.2, and 11.0.0-alpha.6, a malicious website can interact with the preview of a running Storybook development server. Insufficient iframe embedding and message-origin restrictions can allow attacker-controlled events to reach the running preview. A developer must visit the malicious website and interact with the injected interface. The attack can cause unauthorized changes to story files and, if a changed file is later executed by a local runtime, arbitrary code execution with the developer's privileges. This issue is fixed in 8.6.19, 9.1.21, 10.6.2, and 11.0.0-alpha.6.
Remediation
No remediation text is recorded.
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Choose official national sources for this report. Each advisory shows its original language. Your selection is remembered on this device and included in shared links.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2026-107393

No EUVD known-exploited evidence

Storybook is a frontend workshop for building user interface components and pages in isolation. From 8.0.0 until 8.6.19, 9.1.21, 10.6.2, and 11.0.0-alpha.6, a malicious website can interact with the preview of a running Storybook development server. Insufficient iframe embedding and message-origin restrictions can allow attacker-controlled events to reach the running preview. A developer must visit the malicious website and interact with the injected interface. The attack can cause unauthorized changes to story files and, if a changed file is later executed by a local runtime, arbitrary code execution with the developer's privileges. This issue is fixed in 8.6.19, 9.1.21, 10.6.2, and 11.0.0-alpha.6.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
8.6 · CVSS 4.0
Advisory evidence
No linked advisory details stored yet
Recommended actionPatch only the product branches with a verified fix

High technical severity; prioritise exposed affected systems while verifying vendor guidance. Verified remediation exists for at least one product or source, but 10 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.

Fix availability varies by product
01

What, why and how

Storybook is a frontend workshop for building user interface components and pages in isolation. From 8.0.0 until 8.6.19, 9.1.21, 10.6.2, and 11.0.0-alpha.6, a malicious website can interact with the preview of a running Storybook development server. Insufficient iframe embedding and message-origin restrictions can allow attacker-controlled events to reach the running preview. A developer must visit the malicious website and interact with the injected interface. The attack can cause unauthorized changes to story files and, if a changed file is later executed by a local runtime, arbitrary code execution with the developer's privileges. This issue is fixed in 8.6.19, 9.1.21, 10.6.2, and 11.0.0-alpha.6.

What

Storybook is a frontend workshop for building user interface components and pages in isolation. From 8.0.0 until 8.6.19, 9.1.21, 10.6.2, and 11.0.0-alpha.6, a malicious website can interact with the preview of a running Storybook development server. Insufficient iframe embedding and message-origin restrictions can allow attacker-controlled events to reach the running preview. A developer must visit the malicious website and interact with the injected interface. The attack can cause unauthorized changes to story files and, if a changed file is later executed by a local runtime, arbitrary code execution with the developer's privileges. This issue is fixed in 8.6.19, 9.1.21, 10.6.2, and 11.0.0-alpha.6.

Why

Untrusted data can cross into a code-evaluation path and be interpreted as executable instructions.

How

An attacker operating through a network path may attempt exploitation when the stated preconditions are met. If successful, the issue may execute code or commands in the affected security context.

What

Storybook is a frontend workshop for building user interface components and pages in isolation. From 8.0.0 until 8.6.19, 9.1.21, 10.6.2, and 11.0.0-alpha.6, a malicious website can interact with the preview of a running Storybook development server. Insufficient iframe embedding and message-origin restrictions can allow attacker-controlled events to reach the running preview. A developer must visit the malicious website and interact with the injected interface. The attack can cause unauthorized changes to story files and, if a changed file is later executed by a local runtime, arbitrary code execution with the developer's privileges. This issue is fixed in 8.6.19, 9.1.21, 10.6.2, and 11.0.0-alpha.6.

Why

Untrusted data can cross into a code-evaluation path and be interpreted as executable instructions.

How

An attacker operating through a network path may attempt exploitation when the stated preconditions are met. If successful, the issue may execute code or commands in the affected security context.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
a network path → Improper Control of Generation of Code ('Code Injection') → execute code or commands in the affected security context
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
Active interaction required
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Not a CVSS 4.0 base metric
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-94 ↗

CWE-94: Improper Control of Generation of Code ('Code Injection'). The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Common Vulnerability Scoring System 4.0: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.ATNoneAttack requirements: No additional deployment or execution condition is required.PRNonePrivileges required: The attacker does not need an account or existing privileges.UIActiveUser interaction: A user must take a deliberate action for exploitation to succeed.VCHighVulnerable-system confidentiality: A successful attack can cause a major loss.VIHighVulnerable-system integrity: A successful attack can cause a major loss.VAHighVulnerable-system availability: A successful attack can cause a major loss.SCNoneSubsequent-system confidentiality: No direct loss is represented by this metric.SINoneSubsequent-system integrity: No direct loss is represented by this metric.SANoneSubsequent-system availability: No direct loss is represented by this metric.
Post-exploitation / living off the land
After compromise, an attacker may use built-in shells, scripting engines, scheduled tasks and native network utilities for discovery, persistence or movement. This is a plausible LoTL path, not evidence that it has occurred for every attack.
NetworkUnauthenticatedRemote code executionCWE-94
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

ENISA EUVD · EUVD-2026-107393Official EUVD mapping

Storybook is a frontend workshop for building user interface components and pages in isolation. From 8.0.0 until 8.6.19, 9.1.21, 10.6.2, and 11.0.0-alpha.6, a malicious website can interact with the preview of a running Storybook development server. Insufficient iframe embedding and message-origin restrictions can allow attacker-controlled events to reach the running preview. A developer must visit the malicious website and interact with the injected interface. The attack can cause unauthorized changes to story files and, if a changed file is later executed by a local runtime, arbitrary code execution with the developer's privileges. This issue is fixed in 8.6.19, 9.1.21, 10.6.2, and 11.0.0-alpha.6.

Official EUVD record ↗
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Fix availability varies by product
Affected
Fixed
Action
Use the product-specific evidence above. Patch only products with a verified fixed release, and keep every affected or under-investigation state without a matching fix in the remediation queue.
Workaround
No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04

Evidence and provenance

Published 21 Oct 2026 · Last source change 21 Oct 2026, 17:08 UTC · CWE-94 · Improper Control of Generation of Code ('Code Injection')

CVE recordCVE.org · 5.2
CVSS sourceCNA
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-10-22
European sourceENISA EUVD · EUVD-2026-107393
Product sourceVendor CSAF · Red Hat Product Security
Remediation sourceVendor CSAF · Red Hat Product Security
CWE sourceCNA
NVD statusNVD awaiting enrichment

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates ↗
  1. Affected versionsThe structured affected or fixed version information changed.
    Before
    storybook: >= 8.0.0, < 8.6.19, >= 9.0.0, < 9.1.21, >= 10.0.0, < 10.6.2, >= 11.0.0-alpha.0, < 11.0.0-alpha.6 · Fixed: No fixed version is explicitly recorded in the structured CVE data.
    After
    storybook: >= 8.0.0, < 8.6.19, >= 9.0.0, < 9.1.21, >= 10.0.0, < 10.6.2, >= 11.0.0-alpha.0, < 11.0.0-alpha.6 · Fixed: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://images.redhat.com/
    Red Hat Product Security ↗
  2. Vendor guidanceAuthoritative vendor guidance changed from remediation: access.redhat.com/CVE-2026-114125 to remediation: access.redhat.com/CVE-2026-114125.
    Before
    remediation: access.redhat.com/CVE-2026-114125
    After
    remediation: access.redhat.com/CVE-2026-114125
    Red Hat Product Security ↗
  3. Remediation statusRemediation status changed from Awaiting fix to Patch available.
    Before
    Awaiting fix
    After
    Patch available
    Red Hat Product Security ↗
  4. Affected versionsThe structured affected or fixed version information changed.
    Before
    workload-availability/node-healthcheck-must-gather-rhel9 as a component of Node HealthCheck Operator; workload-availability/node-healthcheck-operator-bundle as a component of Node HealthCheck Operator; workload-availability/node-healthcheck-rhel9-operator as a component of Node HealthCheck Operator; workload-availability/node-remediation-console-rhel8 as a component of Node HealthCheck Operator; rh-podman-desktop as a component of Red Hat Build of Podman Desktop; grafana as a component of Red Hat Enterprise Linux 10; grafana-selinux as a component of Red Hat Enterprise Linux 10; grafana.src as a component of Red Hat Enterprise Linux 10; grafana as a component of Red Hat Enterprise Linux 9; grafana-selinux as a component of Red Hat Enterprise Linux 9; grafana.src as a component of Red Hat Enterprise Linux 9; grafana13.1.src as a component of Red Hat Hardened Images; grafana13.2.src as a component of Red Hat Hardened Images
    After
    workload-availability/node-healthcheck-must-gather-rhel9 as a component of Node HealthCheck Operator; workload-availability/node-healthcheck-operator-bundle as a component of Node HealthCheck Operator; workload-availability/node-healthcheck-rhel9-operator as a component of Node HealthCheck Operator; workload-availability/node-remediation-console-rhel8 as a component of Node HealthCheck Operator; rh-podman-desktop as a component of Red Hat Build of Podman Desktop · Fixed: grafana12.4-0:12.4.13-0.3.hum1@aarch64 as a component of Red Hat Hardened Images; grafana12.4-0:12.4.13-0.3.hum1@src as a component of Red Hat Hardened Images; grafana12.4-0:12.4.13-0.3.hum1@x86_64 as a component of Red Hat Hardened Images; grafana13.1-0:13.1.8-0.4.hum1@aarch64 as a component of Red Hat Hardened Images; grafana13.1-0:13.1.8-0.4.hum1@s390x as a component of Red Hat Hardened Images; grafana13.1-0:13.1.8-0.4.hum1@src as a component of Red Hat Hardened Images; grafana13.1-0:13.1.8-0.4.hum1@x86_64 as a component of Red Hat Hardened Images; grafana13.2-0:13.2.4-0.3.hum1@aarch64 as a component of Red Hat Hardened Images; grafana13.2-0:13.2.4-0.3.hum1@s390x as a component of Red Hat Hardened Images; grafana13.2-0:13.2.4-0.3.hum1@src as a component of Red Hat Hardened Images; grafana13.2-0:13.2.4-0.3.hum1@x86_64 as a component of Red Hat Hardened Images
    Red Hat Product Security ↗
  5. ENISA EUVD mappingEUVD-2026-107393 was added to the official ENISA EUVD mapping for this CVE.
    Before
    not recorded
    After
    {"euvdId":"EUVD-2026-107393"}
    ENISA EUVD ↗
  6. Catalogue recordCVE added to the BlackTree catalogue.
    CNA ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Fixed release recorded from official guidance
ENISA EUVD · EUVD-2026-107393↗Red Hat Product Security security advisory↗CVE authority or vendor reference · GitHub GHSA-F2PH-CMG5-WXC8↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2026-114125 · cve.blacktree.nl