TI-2026-10826 Aliases CVE-2026-12635 GHSA-px7v-hx94-8wmf

Reliance on Reverse DNS Resolution for a Security-Critical Action in GitLab

LOW 15CWE-350Published 2026-06-25 · Updated 2026-06-25

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: High
Impact type: —
Confidentiality · integrity · availability: Low · None · None
Fix status: Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 8.3 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 maintainer-role permissions to make requests to internal network resources through mirror synchronization due to improper URL validation.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00249 16th percentileScored 2026-11-07

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: Partial

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

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
GitLab	GitLab	8.3 to before 18.11.6; 19.0 to before 19.0.3; 19.1 to before 19.1.1	18.11.6, 19.0.3, 19.1.1	Patch available	CNA

GitLab VendorGitLab Affected 8.3 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

CPE	Versions	Role	Vendor
cpe:2.3:a:gitlab:gitlab::::::::	8.3.0 to before 18.11.6; 19.0.0 to before 19.0.3	Vulnerable	GitLab
cpe:2.3:a:gitlab:gitlab:19.1.0:::::::*	19.1.0	Vulnerable	GitLab

cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:* Versions 8.3.0 to before 18.11.6; 19.0.0 to before 19.0.3 Vulnerable ·GitLab
cpe:2.3:a:gitlab:gitlab:19.1.0:*:*:*:*:*:*:* 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 · 2026-06-25
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-2026-08841 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLabPriority MEDIUM 40
- 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
Show all 12 records →

Timeline

2026-10-02 Threatist record created from CVE-2026-12635
2026-10-03 Alias added: GHSA-px7v-hx94-8wmf

References

Advisory 1

https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-1-1-released/

Other 1

https://gitlab.com/gitlab-org/gitlab/-/work_items/594321

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