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TI-2023-01198 Aliases CVE-2023-1265GHSA-34vw-vvrj-pr33

Session fixation in GitLab

Priority MEDIUM 58CWE-384Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
Required
Attack complexity
High
Impact type
Spoofing
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-384.

Summary

An issue has been discovered in GitLab affecting all versions starting from 11.9 before 15.9.6, all versions starting from 15.10 before 15.10.5, all versions starting from 15.11 before 15.11.1. The condition allows for a privileged attacker, under certain conditions, to obtain session tokens from all users of a GitLab instance.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00781 56th percentileScored 2026-11-07
Fix Fixed GitLab (GitLab): 15.9.6, 15.10.5, 15.11.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
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
GitLabGitLab11.9 to before 15.9.6; 15.10 to before 15.10.5; 15.11 to before 15.11.115.9.6, 15.10.5, 15.11.1Patch availableCNA
  • GitLab VendorGitLab Affected 11.9 to before 15.9.6; 15.10 to before 15.10.5; 15.11 to before 15.11.1 Fixed in 15.9.6, 15.10.5, 15.11.1 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*11.9 to before 15.9.6; 15.10 to before 15.10.5; 15.11 to before 15.11.1VulnerableGitLab
  • cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:* Versions 11.9 to before 15.9.6; 15.10 to before 15.10.5; 15.11 to before 15.11.1 Vulnerable ·GitLab

Remediation

  • Fix · CNA GitLab (GitLab) Fixed in 15.9.6, 15.10.5, 15.11.1

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-1265
  2. 2026-10-03 Alias added: GHSA-34vw-vvrj-pr33

References

Advisory 1

Other 2

  • 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