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Full vulnerability report · 2026
CVE-2026-39364High confidence

Vite has a `server.fs.deny` bypass with queries

vitejs · vite

Official source article: GitHub GHSA-V2WJ-Q39Q-566R ↗. Check the applicable product and release in the original source.

8.2HighCVSS 4.0
Recommended action
Within 7 days

High technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.

Patch available
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityHighOperational priority:Critical, raised one band.upgradedsince 17 Aug 2026

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • A structured source references public exploit or proof-of-concept material.
  • The selected CVSS metric records a network-reachable, unauthenticated path with no user interaction.
  • EPSS is 1.54% 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.
  • Increase monitoring for the attack path and post-exploitation behaviour described in the report.

Verification

  1. Confirm that the asset runs vitejs vite 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 3 daysRemediation target: Within 90 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.

Open-source package ranges4 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
npmvite>= 8.0.0, <= 8.0.48.0.5GitHub advisory ↗upstream repository advisory · 7 Apr 2026
npmvite>= 7.1.0, <= 7.3.17.3.2GitHub advisory ↗upstream repository advisory · 7 Apr 2026
npmviteSEMVER: introduced 8.0.0; fixed 8.0.58.0.5OSV record ↗aggregator derived · 10 Sep 2026
npmviteSEMVER: introduced 7.1.0; fixed 7.3.27.3.2OSV record ↗aggregator derived · 10 Sep 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.

1 current
CVE-2026-39364 · CSAF 2.0 · revision 3 · finalRed Hat Product Securityvite: Vite: Information disclosure via query parameter manipulation on the development server
7 known affected

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

  • automation-controller.src as a component of Red Hat Ansible Automation Platform 2
  • vite as a component of Red Hat Build of Keycloak
  • podman-desktop-macos-1-0 as a component of Red Hat Build of Podman Desktop
  • podman-desktop-windows-1-0 as a component of Red Hat Build of Podman Desktop
  • redhat-user-workloads/bootc-ext as a component of Red Hat Build of Podman Desktop - Tech Preview
  • redhat-user-workloads/openshift-local-ext as a component of Red Hat Build of Podman Desktop - Tech Preview
  • redhat-user-workloads/rhel-ext as a component of Red Hat Build of Podman Desktop - Tech Preview
Summary
A flaw was found in Vite, a frontend tooling framework for JavaScript. On the Vite development server, a remote attacker could exploit this vulnerability by appending specific query parameters, such as ?raw, to requests. This allows the attacker to bypass security restrictions and retrieve sensitive files, including environment variables (.env) and certificate files (*.crt), which should otherwise be blocked. This information disclosure could lead to further compromise of the system.
Remediation
Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://docs.redhat.com/en/documentation/red_hat_ansible_automation_platform/2.6#Upgrade
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-2026-19873

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

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
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionWithin 7 days

High technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.

Patch available
01

What, why and how

Vite is a frontend tooling framework for JavaScript. From 7.1.0 to before 7.3.2 and 8.0.5, on the Vite dev server, files that should be blocked by server.fs.deny (e.g., .env, *.crt) can be retrieved with HTTP 200 responses when query parameters such as ?raw, ?import&raw, or ?import&url&inline are appended. This vulnerability is fixed in 7.3.2 and 8.0.5.

What

Vite is a frontend tooling framework for JavaScript. From 7.1.0 to before 7.3.2 and 8.0.5, on the Vite dev server, files that should be blocked by server.fs.deny (e.g., .env, *.crt) can be retrieved with HTTP 200 responses when query parameters such as ?raw, ?import&raw, or ?import&url&inline are appended. This vulnerability is fixed in 7.3.2 and 8.0.5.

Why

The product validates input before it is canonicalized, which prevents the product from detecting data that becomes invalid after the canonicalization step.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

Vite is a frontend tooling framework for JavaScript. From 7.1.0 to before 7.3.2 and 8.0.5, on the Vite dev server, files that should be blocked by server.fs.deny (e.g., .env, *.crt) can be retrieved with HTTP 200 responses when query parameters such as ?raw, ?import&raw, or ?import&url&inline are appended. This vulnerability is fixed in 7.3.2 and 8.0.5.

Why

The product validates input before it is canonicalized, which prevents the product from detecting data that becomes invalid after the canonicalization step.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

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.
Reference recorded

A structured CVE source labels at least one public reference as exploit material. BlackTree has not independently validated that it is safe, reliable or weaponised.

Likely attack path
a network path → Incorrect Behavior Order: Validate Before Canonicalize → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
None
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-180 ↗

CWE-180: Incorrect Behavior Order: Validate Before Canonicalize. The product validates input before it is canonicalized, which prevents the product from detecting data that becomes invalid after the canonicalization step.

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:P/PR:N/UI:N/VC:H/VI:N/VA:N/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.ATPresentAttack requirements: A particular deployment or execution condition must be present.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.VCHighVulnerable-system confidentiality: A successful attack can cause a major loss.VINoneVulnerable-system integrity: No direct loss is represented by this metric.VANoneVulnerable-system availability: No direct loss is represented by this metric.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
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkUnauthenticatedCWE-180Public exploit reference
A

Official authority intelligence

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

JVN iPedia · Japanese · JVNDB-2026-011461vitejsのVite+等の複数製品における複数の脆弱性

ViteはJavaScriptのフロントエンド開発用ツールフレームワークです。バージョン7.1.0から7.3.2未満および8.0.5にかけて、Viteの開発サーバーでは、server.fs.denyでブロックされるべきファイル（例: .env、*.crt）が、?raw、?import&raw、または?import&url&inlineといったクエリパラメータを付加することでHTTP 200の応答として取得可能でした。この脆弱性は7.3.2および8.0.5で修正されています。

Official advisory ↗
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.
Patch available
Affected
Fixed
Action
Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://docs.redhat.com/en/documentation/red_hat_ansible_automation_platform/2.6#Upgrade
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 7 Apr 2026 · Last source change 17 Aug 2026, 12:05 UTC · CWE-180 · Incorrect Behavior Order: Validate Before Canonicalize

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 2026-08-14
European sourceENISA EUVD · EUVD-2026-19873
Product sourceVendor CSAF · Red Hat Product Security
Remediation sourceVendor CSAF · Red Hat Product Security
CWE sourceCNA
NVD statusNVD modified after 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
    automation-controller.src as a component of Red Hat Ansible Automation Platform 2; vite as a component of Red Hat Build of Keycloak; podman-desktop-macos-1-0 as a component of Red Hat Build of Podman Desktop; podman-desktop-windows-1-0 as a component of Red Hat Build of Podman Desktop; redhat-user-workloads/bootc-ext as a component of Red Hat Build of Podman Desktop - Tech Preview; redhat-user-workloads/openshift-local-ext as a component of Red Hat Build of Podman Desktop - Tech Preview; redhat-user-workloads/rhel-ext as a component of Red Hat Build of Podman Desktop - Tech Preview; redhat-user-workloads/art-images as a component of Red Hat OpenShift Container Platform 4 · Fixed: registry.redhat.io/ansible-automation-platform-tech-preview/mcp-server-rhel9@sha256:0233c53a96cc685fc0d82596b84ab8a783ce7affba89dd85def7ad7eacf5bdfe_s390x as a component of Red Hat Ansible Automation Platform 2.6; registry.redhat.io/ansible-automation-platform-tech-preview/mcp-server-rhel9@sha256:574420f56707cf437a81dc92ad5ec529d9e9c5a668dbd569b41becc7fde7e194_ppc64le as a component of Red Hat Ansible Automation Platform 2.6; registry.redhat.io/ansible-automation-platform-tech-preview/mcp-server-rhel9@sha256:60e660bf0d066c3f799259e57000dcb1d7974753c49771d15361321353ebeb4a_amd64 as a component of Red Hat Ansible Automation Platform 2.6; registry.redhat.io/ansible-automation-platform-tech-preview/mcp-server-rhel9@sha256:bc80d85ced33bf5b7dc60d6d7555949c98cc4ee506d10ea5bb8a8691e58e8f42_arm64 as a component of Red Hat Ansible Automation Platform 2.6
    After
    automation-controller.src as a component of Red Hat Ansible Automation Platform 2; vite as a component of Red Hat Build of Keycloak; podman-desktop-macos-1-0 as a component of Red Hat Build of Podman Desktop; podman-desktop-windows-1-0 as a component of Red Hat Build of Podman Desktop; redhat-user-workloads/bootc-ext as a component of Red Hat Build of Podman Desktop - Tech Preview; redhat-user-workloads/openshift-local-ext as a component of Red Hat Build of Podman Desktop - Tech Preview; redhat-user-workloads/rhel-ext as a component of Red Hat Build of Podman Desktop - Tech Preview · Fixed: registry.redhat.io/ansible-automation-platform-tech-preview/mcp-server-rhel9@sha256:0233c53a96cc685fc0d82596b84ab8a783ce7affba89dd85def7ad7eacf5bdfe_s390x as a component of Red Hat Ansible Automation Platform 2.6; registry.redhat.io/ansible-automation-platform-tech-preview/mcp-server-rhel9@sha256:574420f56707cf437a81dc92ad5ec529d9e9c5a668dbd569b41becc7fde7e194_ppc64le as a component of Red Hat Ansible Automation Platform 2.6; registry.redhat.io/ansible-automation-platform-tech-preview/mcp-server-rhel9@sha256:60e660bf0d066c3f799259e57000dcb1d7974753c49771d15361321353ebeb4a_amd64 as a component of Red Hat Ansible Automation Platform 2.6; registry.redhat.io/ansible-automation-platform-tech-preview/mcp-server-rhel9@sha256:bc80d85ced33bf5b7dc60d6d7555949c98cc4ee506d10ea5bb8a8691e58e8f42_arm64 as a component of Red Hat Ansible Automation Platform 2.6
    Red Hat Product Security ↗
  2. Affected versionsThe structured affected or fixed version information changed.
    Before
    >= 8.0.0, < 8.0.5; >= 7.1.0, < 7.3.2; < 0.1.16 · Fixed: No fixed version is explicitly recorded in the structured CVE data.
    After
    >= 8.0.0, < 8.0.5; >= 7.1.0, < 7.3.2; < 0.1.16 · Fixed: Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://docs.redhat.com/en/documentation/red_hat_ansible_automation_platform/2.6#Upgrade
    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 ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Fixed release recorded from official guidance
Fixed release recorded from official guidance
ENISA EUVD · EUVD-2026-19873↗Red Hat Product Security security advisory↗CISA Vulnrichment SSVC evidence↗Public exploit reference · GitHub GHSA-V2WJ-Q39Q-566R↗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-2026-39364 · cve.blacktree.nl