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TI-2026-08841 Aliases CVE-2026-10086GHSA-fc6w-qm7g-jfwh

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

Priority MEDIUM 40CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
High · High · 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 EE affecting all versions from 16.4 before 18.11.6, 19.0 before 19.0.3, and 19.1 before 19.1.1 that under certain conditions could have allowed an authenticated user with developer-role permissions to execute arbitrary client-side code in the context of another user's session, due to improper sanitization of user-supplied input.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00349 28th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed GitLab (GitLab): 18.11.6, 19.0.3, 19.1.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

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

Affected products

VendorProductAffected versionsFixed inStatusSource
GitLabGitLab16.4 to before 18.11.6; 19.0 to before 19.0.3; 19.1 to before 19.1.118.11.6, 19.0.3, 19.1.1Patch availableCNA
  • GitLab VendorGitLab Affected 16.4 to before 18.11.6; 19.0 to before 19.0.3; 19.1 to before 19.1.1 Fixed in 18.11.6, 19.0.3, 19.1.1 Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*16.4.0 to before 18.11.6; 19.0.0 to before 19.0.3VulnerableGitLab
cpe:2.3:a:gitlab:gitlab:19.1.0:*:*:*:enterprise:*:*:*19.1.0VulnerableGitLab
  • cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:* Versions 16.4.0 to before 18.11.6; 19.0.0 to before 19.0.3 Vulnerable ·GitLab
  • cpe:2.3:a:gitlab:gitlab:19.1.0:*:*:*:enterprise:*:*:* Versions 19.1.0 Vulnerable ·GitLab

Remediation

  • Fix · CNA GitLab (GitLab) Fixed in 18.11.6, 19.0.3, 19.1.1

Fixed in the same release

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

  • Release ·

    GitLab 18.11.6, 19.0.3, 19.1.1

    12 records Highest priority Priority MEDIUM 1 MEDIUM, 11 LOW

    Other records, highest priority first

    • TI-2026-09210 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLabPriority LOW 37
    • TI-2026-01885 Missing Authorization in GitLabPriority LOW 30
    • TI-2026-09822 Incorrect Authorization in GitLabPriority LOW 24
    Show all 12 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-10086
  2. 2026-10-03 Alias added: GHSA-fc6w-qm7g-jfwh

References

Exploit 1

Patch 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