Evidence used
- No CISA KEV confirmation is currently recorded.
- A structured source references public exploit or proof-of-concept material.
- EPSS is 0.32% for the current model date.
BlackTreeCVE IntelligenceFull vulnerability report · 2026
CVE-2026-103387High confidence
garycourt uri-js Mailto Header mailto.ts URI.parse uncaught exception
garycourt · uri-js
5.3MediumCVSS 4.0
Within 7 days
Fix not verifiedMedium technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.
R
Open reassessment dashboard →Operational reassessment
Published severity in operational context
Published severityMedium→Operational priority:High, raised one band.upgradedsince 30 Sep 2026
Compensating controls
- 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
- Confirm that the asset runs garycourt uri-js and falls inside the recorded affected range.
- Recheck the vendor advisory before scheduling a change because no verified fixed version is currently retained.
- Validate exposure, authentication requirements and compensating controls in the actual environment.
- Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Distribution package intelligence
5 package statesRelease-specific package status
Debian, ubuntu findings are scoped to the named distribution, release and source package. An absent finding does not mean a package is unaffected.
Repository candidate not checked
A published vendor fix does not prove that a matching update is enabled and installable on a particular asset. Confirm the local package candidate before scheduling remediation.
| Distribution release | Source package | Vendor state | Fixed version | Evidence |
|---|---|---|---|---|
| Debian trixietrixie · source | node-uri-js | Affected, no fix publishedDebian currently tracks this release as open. | Not published in this feed | Debian Security Tracker ↗Source updated 9 Oct 2026 |
| Debian bookwormbookworm · source | node-uri-js | Affected, no fix publishedDebian currently tracks this release as open. | Not published in this feed | Debian Security Tracker ↗Source updated 9 Oct 2026 |
| Debian forkyforky · source | node-uri-js | Affected, no fix publishedDebian currently tracks this release as open. | Not published in this feed | Debian Security Tracker ↗Source updated 9 Oct 2026 |
| Debian sidsid · source | node-uri-js | Affected, no fix publishedDebian currently tracks this release as open. | Not published in this feed | Debian Security Tracker ↗Source updated 9 Oct 2026 |
| Ubuntu 24.04 LTSnoble · standard archive | node-uri-js | Under evaluationCanonical reports that the package might be affected and still needs evaluation or fixing. | Not published in this feed | Canonical Ubuntu Security ↗Source updated 8 Oct 2026 |
Direct vendor intelligence
2 currentAuthoritative 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.
CVE-2026-103387 · CSAF 2.0 · revision 3 · finalRed Hat Product Securityuri-js: uri-js: Denial of Service via crafted mailto URI
The vendor explicitly states that these products are not affected by this CVE.
- dotnet8.0.src as a component of Red Hat Hardened Images
- grafana12.4.src as a component of Red Hat Hardened Images
- grafana13.1.src as a component of Red Hat Hardened Images
- grafana13.2.src as a component of Red Hat Hardened Images
- jaeger.src as a component of Red Hat Hardened Images
- opentelemetry-collector-contrib.src as a component of Red Hat Hardened Images
- opentelemetry-collector-k8s.src as a component of Red Hat Hardened Images
- opentelemetry-collector.src as a component of Red Hat Hardened Images
- prometheus3.13.src as a component of Red Hat Hardened Images
- rust.src as a component of Red Hat Hardened Images
- Summary
- A flaw was found in uri-js. A remote attacker can cause a Denial of Service (DoS) by providing a specially crafted mailto URI to the parsing function. Improper handling of mailto header arguments triggers an uncaught exception, resulting in an application crash.
- Remediation
- No remediation text is recorded.
CVE-2026-103387 · CSAF 2.0 · revision 2 · interimSUSE Product Security TeamCVE-2026-103387
The vendor explicitly identifies these products as affected by this CVE.
- pgadmin4 as component of SUSE Linux Enterprise Desktop 15 SP7
- pgadmin4-doc as component of SUSE Linux Enterprise Desktop 15 SP7
- pgadmin4-web as component of SUSE Linux Enterprise Desktop 15 SP7
- system-user-pgadmin as component of SUSE Linux Enterprise Desktop 15 SP7
- pgadmin4 as component of SUSE Linux Enterprise High Performance Computing 15 SP1
- pgadmin4-doc as component of SUSE Linux Enterprise High Performance Computing 15 SP1
- pgadmin4-web as component of SUSE Linux Enterprise High Performance Computing 15 SP1
- pgadmin4 as component of SUSE Linux Enterprise High Performance Computing 15 SP2
- pgadmin4-doc as component of SUSE Linux Enterprise High Performance Computing 15 SP2
- pgadmin4-web as component of SUSE Linux Enterprise High Performance Computing 15 SP2
- pgadmin4 as component of SUSE Linux Enterprise High Performance Computing 15 SP3
- pgadmin4-doc as component of SUSE Linux Enterprise High Performance Computing 15 SP3
- Summary
- A weakness has been identified in garycourt uri-js up to 4.4.1. This affects the function URI.parse of the file src/schemes/mailto.ts of the component Mailto Header Handler. This manipulation of the argument to causes uncaught exception. The attack may be initiated remotely. The exploit has been made available to the public and could be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.
- Remediation
- No remediation text is recorded.
Medium technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.
Fix not verified01
What, why and how
A weakness has been identified in garycourt uri-js up to 4.4.1. This affects the function URI.parse of the file src/schemes/mailto.ts of the component Mailto Header Handler. This manipulation of the argument to causes uncaught exception. The attack may be initiated remotely. The exploit has been made available to the public and could be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.
What
A weakness has been identified in garycourt uri-js up to 4.4.1. This affects the function URI.parse of the file src/schemes/mailto.ts of the component Mailto Header Handler. This manipulation of the argument to causes uncaught exception. The attack may be initiated remotely. The exploit has been made available to the public and could be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.
Why
An exception is thrown from a function, but it is not caught.
How
An attacker operating through a network path may attempt exploitation when the stated preconditions are met. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.
What
A weakness has been identified in garycourt uri-js up to 4.4.1. This affects the function URI.parse of the file src/schemes/mailto.ts of the component Mailto Header Handler. This manipulation of the argument to causes uncaught exception. The attack may be initiated remotely. The exploit has been made available to the public and could be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.
Why
An exception is thrown from a function, but it is not caught.
How
An attacker operating through a network path may attempt exploitation when the stated preconditions are met. 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 No confirmed evidence
?
Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.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 Reference recorded
?
Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.CISA Vulnrichment records proof-of-concept exploitation in its SSVC data. BlackTree has not independently executed or validated exploit material.
- Likely attack path
- a network path → Uncaught Exception → cause the confidentiality, integrity or availability impact described by the vendor
- Attack surface
- Network
- Privileges required
- None: unauthenticated exploitation is possible
- User interaction
- Passive 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-248 ↗
CWE-248: Uncaught Exception. An exception is thrown from a function, but it is not caught.
- 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:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:PCommon 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.UIPassiveUser interaction: A user must unknowingly interact with the vulnerable system.VCNoneVulnerable-system confidentiality: No direct loss is represented by this metric.VINoneVulnerable-system integrity: No direct loss is represented by this metric.VALowVulnerable-system availability: A successful attack can cause a limited 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
- 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.
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 not verified
- Affected
- pgadmin4 as component of SUSE Linux Enterprise Desktop 15 SP7
- pgadmin4-doc as component of SUSE Linux Enterprise Desktop 15 SP7
- pgadmin4-web as component of SUSE Linux Enterprise Desktop 15 SP7
- system-user-pgadmin as component of SUSE Linux Enterprise Desktop 15 SP7
- pgadmin4 as component of SUSE Linux Enterprise High Performance Computing 15 SP1
- pgadmin4-doc as component of SUSE Linux Enterprise High Performance Computing 15 SP1
- pgadmin4-web as component of SUSE Linux Enterprise High Performance Computing 15 SP1
- pgadmin4 as component of SUSE Linux Enterprise High Performance Computing 15 SP2
- pgadmin4-doc as component of SUSE Linux Enterprise High Performance Computing 15 SP2
- pgadmin4-web as component of SUSE Linux Enterprise High Performance Computing 15 SP2
- pgadmin4 as component of SUSE Linux Enterprise High Performance Computing 15 SP3
- pgadmin4-doc as component of SUSE Linux Enterprise High Performance Computing 15 SP3
- pgadmin4-web as component of SUSE Linux Enterprise High Performance Computing 15 SP3
- pgadmin4 as component of SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS
- pgadmin4-doc as component of SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS
- pgadmin4-web as component of SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS
- pgadmin4 as component of SUSE Linux Enterprise High Performance Computing 15 SP4
- pgadmin4-doc as component of SUSE Linux Enterprise High Performance Computing 15 SP4
- pgadmin4-web as component of SUSE Linux Enterprise High Performance Computing 15 SP4
- pgadmin4 as component of SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS
- pgadmin4-doc as component of SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS
- pgadmin4-web as component of SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS
- pgadmin4 as component of SUSE Linux Enterprise High Performance Computing 15 SP5
- pgadmin4-doc as component of SUSE Linux Enterprise High Performance Computing 15 SP5
- pgadmin4-web as component of SUSE Linux Enterprise High Performance Computing 15 SP5
- cockpit as component of SUSE Linux Enterprise Micro 5.3
- cockpit-bridge as component of SUSE Linux Enterprise Micro 5.3
- cockpit-machines as component of SUSE Linux Enterprise Micro 5.3
- cockpit-networkmanager as component of SUSE Linux Enterprise Micro 5.3
- cockpit-podman as component of SUSE Linux Enterprise Micro 5.3
- and 230 more
- Fixed
- No fixed version is explicitly recorded in the structured CVE data.
- Action
- No verified patch reference is present in the current structured sources. Check the vendor advisory before making a change.
- 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 30 Sept 2026 · Last source change 30 Sept 2026, 19:55 UTC · CWE-248 · Uncaught Exception
CVE recordCVE.org · 5.2
CVSS sourceCNA
EPSS source FIRST · tracked since 2026-10-01
?
The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.European sourceENISA EUVD · EUVD-2026-90361
Product sourceVendor CSAF · SUSE Product Security Team
Remediation sourceCVE/CNA references
CWE sourceCNA
NVD statusNVD not scheduled
Core structured fields are present and their contributing authorities are shown above.
Material change intelligence
View recent updates ↗What changed after publication
- Vendor guidanceAuthoritative vendor guidance changed from remediation: access.redhat.com/CVE-2026-103387 to remediation: access.redhat.com/CVE-2026-103387.Red Hat Product Security ↗
- Before
- remediation: access.redhat.com/CVE-2026-103387
- After
- remediation: access.redhat.com/CVE-2026-103387
- Affected versionsThe structured affected or fixed version information changed.Red Hat Product Security ↗
- Before
- grafana12.4.src as a component of Red Hat Hardened Images; grafana13.1.src as a component of Red Hat Hardened Images; grafana13.2.src as a component of Red Hat Hardened Images
- After
- ENISA EUVD mappingEUVD-2026-90361 was added to the official ENISA EUVD mapping for this CVE.ENISA EUVD ↗
- Before
- not recorded
- After
- {"euvdId":"EUVD-2026-90361"}
- Affected versionsThe structured affected or fixed version information changed.Red Hat Product Security ↗
- Before
- dotnet8.0.src as a component of Red Hat Hardened Images; grafana12.4.src as a component of Red Hat Hardened Images; grafana13.1.src as a component of Red Hat Hardened Images; grafana13.2.src as a component of Red Hat Hardened Images; jaeger.src as a component of Red Hat Hardened Images; opentelemetry-collector-contrib.src as a component of Red Hat Hardened Images; opentelemetry-collector-k8s.src as a component of Red Hat Hardened Images; opentelemetry-collector.src as a component of Red Hat Hardened Images; prometheus3.13.src as a component of Red Hat Hardened Images; rust.src as a component of Red Hat Hardened Images
- After
- grafana12.4.src as a component of Red Hat Hardened Images; grafana13.1.src as a component of Red Hat Hardened Images; grafana13.2.src as a component of Red Hat Hardened Images
- Catalogue recordCVE added to the BlackTree catalogue.CNA ↗
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.