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CVE-2025-13761 GitLab CVE debrief

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.6 before 18.6.3, and 18.7 before 18.7.1 that could have allowed an unauthenticated user to execute arbitrary code in the context of an authenticated user's browser by convincing the legitimate user to visit a specially crafted webpage. This issue has been patched in GitLab versions 18.6.3 and 18.7.1. Users of affected versions should update to a patched version as soon as possible. The CVSS score for this vulnerability is 8, indicating a high severity. The vulnerability was publicly disclosed on January 9, 2026, and has since been modified on June 30, 2026.

Vendor
GitLab
Product
Unknown
CVSS
HIGH 8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-01-09
Original CVE updated
2026-07-15
Advisory published
2026-01-09
Advisory updated
2026-07-15

Who should care

Administrators and users of GitLab CE/EE versions 18.6 before 18.6.3 and 18.7 before 18.7.1 should be aware of this vulnerability and take immediate action to update to a patched version. Additionally, security teams and vulnerability managers should be aware of the potential impact of this vulnerability and prioritize patching accordingly.

Technical summary

The vulnerability in GitLab CE/EE allows an unauthenticated user to execute arbitrary code in the context of an authenticated user's browser. This is achieved by convincing the legitimate user to visit a specially crafted webpage. The issue affects all versions from 18.6 before 18.6.3 and 18.7 before 18.7.1. The CVSS vector for this vulnerability is CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N, indicating a high severity. The weakness associated with this vulnerability is CWE-79.

Defensive priority

High priority should be given to patching GitLab CE/EE versions 18.6 before 18.6.3 and 18.7 before 18.7.1. Administrators should update to versions 18.6.3 or 18.7.1 as soon as possible to mitigate the risk of arbitrary code execution.

Recommended defensive actions

  • Update GitLab CE/EE to version 18.6.3 or 18.7.1
  • Review and apply patches provided by GitLab
  • Monitor GitLab instances for suspicious activity
  • Restrict access to sensitive areas of the GitLab instance
  • Implement additional security measures to detect and prevent similar vulnerabilities

Evidence notes

The vulnerability was publicly disclosed on January 9, 2026, and has since been modified on June 30, 2026. The CVSS score for this vulnerability is 8, indicating a high severity. The weakness associated with this vulnerability is CWE-79. The vulnerability affects all versions from 18.6 before 18.6.3 and 18.7 before 18.7.1.

Sources and references

Verified primary and authoritative sources

  • CVE-2025-13761 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2025-13761

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2025-13761 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2025-13761

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Mitigation or vendor reference

    Unverified legacy reference

    URL: https://about.gitlab.com/releases/2026/01/07/patch-release-gitlab-18-7-1-released/

    [email protected] - Release Notes, Vendor Advisory

  • Source reference

    Unverified legacy reference

    URL: https://gitlab.com/gitlab-org/gitlab/-/issues/582237

    [email protected] - Broken Link

  • Source reference

    Unverified legacy reference

    URL: https://hackerone.com/reports/3441368

    [email protected] - Permissions Required

  • Source reference

    Unverified legacy reference

    URL: https://access.redhat.com/security/cve/CVE-2025-13761

    0b0ca135-0b70-47e7-9f44-1890c2a1c46c

  • Source reference

    Unverified legacy reference

    URL: https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-13761.json

    0b0ca135-0b70-47e7-9f44-1890c2a1c46c

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.