CVE-2026-5173HIGH 8.5EPSS p31.3%

CVE-2026-5173CVE-2026-5173

Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 16.9.6 before 18.8.9, 18.9 before 18.9.5, and 18.10 before 18.10.3 that could have allowed an authenticated user to invoke unintended server-side methods through websocket connections due to improper access control.

Scoring

CVSS 3.18.5 (HIGH)
VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
EPSS0.40% probability of exploitation · percentile 31.3% · 2026-06-19T12:03:05Z
Published2026-04-08
Last modified2026-04-16

Underlying weaknesses· 1

CWE-749

References

  1. https://about.gitlab.com/releases/2026/04/08/patch-release-gitlab-18-10-3-released/
  2. https://gitlab.com/gitlab-org/gitlab/-/work_items/588959

1

TypeTargetConfidenceTier
WeaknessExposed Dangerous Method or Functioncwe-7490%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.