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3.5

GitLab may let logged-in users contact internal servers

CVE-2026-100104 · published 6 days ago
Summary

GitLab versions from 10.3 up to 19.4.1 allow a signed‑in user to trick the system into sending requests to internal network resources when importing a repository. This could expose internal services or data to an attacker. Apply the latest GitLab update that fixes the issue or restrict repository import to trusted sources.

What to do
  • Update gitlab to version 19.4.2.
Affected software
Ecosystem VendorProductAffected versions
– gitlab gitlab < 19.2.8
>= 19.3.0, < 19.3.5
>= 19.4.0, < 19.4.2
>= 10.3.0, < 19.2.8
Bitnami – gitlab >= 19.4.0, < 19.4.2
Fix: upgrade to 19.4.2
Ubuntu:16.04:LTS canonical gitlab All versions
Original advisory text
Server-Side Request Forgery (SSRF) in GitLab
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 10.3 before 19.2.8, 19.3 before 19.3.5, and 19.4 before 19.4.2 that, under certain conditions, could have allowed an authenticated user to perform server-side request forgery and reach internal network resources due to a time-of-check to time-of-use race condition in URL validation during repository import operations.
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker partial control
Severity
3.5 Low
Exploitation
<1% chance of attack within 30 days
Type
CWE-918Server-Side Request Forgery (SSRF)
Timeline
Published13 Oct 2026
Updated17 Oct 2026
First seen13 Oct 2026
Sources
CVE-2026-100104 · NVD
CVE-2026-100104 · MITRE
BIT-gitlab-2026-100104 · OSV
UBUNTU-CVE-2026-100104 · OSV
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