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TI-2026-02565 Aliases CVE-2026-2973GHSA-v4cx-jmp6-mgf4

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab

Priority LOW 24CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 17.7 before 18.8.7, 18.9 before 18.9.3, and 18.10 before 18.10.1 that could have allowed an authenticated user to execute arbitrary JavaScript in a user's browser due to improper sanitization of entity-encoded content in Mermaid diagrams.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00176 7th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed GitLab (GitLab): 18.8.7, 18.9.3, 18.10.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
GitLabGitLab17.7 to before 18.8.7; 18.9 to before 18.9.3; 18.10 to before 18.10.118.8.7, 18.9.3, 18.10.1Patch availableCNA
  • GitLab VendorGitLab Affected 17.7 to before 18.8.7; 18.9 to before 18.9.3; 18.10 to before 18.10.1 Fixed in 18.8.7, 18.9.3, 18.10.1 Patch available CNA

CPE configurations NVD · 6

CPEVersionsRoleVendor
cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*17.7.0 to before 18.8.7VulnerableGitLab
cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*17.7.0 to before 18.8.7VulnerableGitLab
cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*18.9.0 to before 18.9.3VulnerableGitLab
cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*18.9.0 to before 18.9.3VulnerableGitLab
cpe:2.3:a:gitlab:gitlab:18.10.0:*:*:*:community:*:*:*18.10.0VulnerableGitLab
cpe:2.3:a:gitlab:gitlab:18.10.0:*:*:*:enterprise:*:*:*18.10.0VulnerableGitLab
  • cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:* Versions 17.7.0 to before 18.8.7 Vulnerable ·GitLab
  • cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:* Versions 17.7.0 to before 18.8.7 Vulnerable ·GitLab
  • cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:* Versions 18.9.0 to before 18.9.3 Vulnerable ·GitLab
  • cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:* Versions 18.9.0 to before 18.9.3 Vulnerable ·GitLab
  • cpe:2.3:a:gitlab:gitlab:18.10.0:*:*:*:community:*:*:* Versions 18.10.0 Vulnerable ·GitLab
  • cpe:2.3:a:gitlab:gitlab:18.10.0:*:*:*:enterprise:*:*:* Versions 18.10.0 Vulnerable ·GitLab

Remediation

  • Fix · CNA GitLab (GitLab) Fixed in 18.8.7, 18.9.3, 18.10.1

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    GitLab 18.10.1, 18.8.7, 18.9.3

    11 records Highest priority Priority MEDIUM 1 MEDIUM, 10 LOW

    Other records, highest priority first

    • TI-2025-11962 Improper Validation of Specified Quantity in Input in GitLabPriority MEDIUM 62
    • TI-2026-03452 Inefficient Algorithmic Complexity in GitLabPriority LOW 39
    • TI-2026-03343 Cross-Site Request Forgery (CSRF) in GitLabPriority LOW 39
    Show all 11 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-2973
  2. 2026-10-03 Alias added: GHSA-v4cx-jmp6-mgf4

References

Exploit 1

Advisory 1

Other 1

  • TI-2026-71508 Integer overflow in GitLab allows code execution on the server KEVCVSS 3.1CRITICAL 10.0
  • TI-2026-58817 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in GitLab KEVCVSS 3.1CRITICAL 10.0
  • TI-2023-06425 Weak Password Recovery Mechanism for Forgotten Password in GitLab KEVCVSS 3.1CRITICAL 10.0
  • TI-2021-05191 Code injection in GitLab KEVCVSS 3.1CRITICAL 10.0
  • TI-2021-05161 Server-side request forgery in GitLab KEVCVSS 3.1CRITICAL 9.8
  • TI-2022-02763 Injection in GitLab CVSS 3.1CRITICAL 9.9
See all 1506 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences