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9.9

GitLab lets logged‑in users view admin search settings

CVE-2026-87719 · published 1 month ago
Summary

Certain versions of GitLab let a user who is signed in and can use Duo Chat request hidden search configurations and secret credentials by sending a specially crafted request. This could expose internal settings and passwords. Upgrade GitLab to the latest patched release or apply the vendor’s update as soon as possible.

What to do
  • Update gitlab to version 19.3.2.
Affected software
Ecosystem VendorProductAffected versions
– gitlab gitlab < 19.1.8
< 18.11.12
>= 18.3.0, < 18.11.12
>= 19.0.0, < 19.0.9
>= 19.1.0, < 19.1.8
>= 19.2.0, < 19.2.6
>= 19.3.0, < 19.3.2
Bitnami – gitlab >= 19.3.0, < 19.3.2
Fix: upgrade to 19.3.2
Original advisory text
Deserialization of Untrusted Data in GitLab
GitLab has remediated an issue in GitLab EE affecting all versions from 18.3 before 18.11.12, 19.0 before 19.0.9, 19.1 before 19.1.8, 19.2 before 19.2.6, and 19.3 before 19.3.2 that under certain conditions could allow an authenticated user with Duo Chat access to obtain Advanced Search instance configurations and sensitive credentials using a specially crafted GraphQL subscription argument to bypass serialization and perform server object lookup.
References
Fix within
Internet-facing 14 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker full control
Severity
9.9 Critical
Exploitation
<1% chance of attack within 30 days
Type
CWE-502Deserialization of Untrusted Data
Timeline
Published12 Sep 2026
Updated11 Oct 2026
First seen12 Sep 2026
Sources
CVE-2026-87719 · NVD
CVE-2026-87719 · MITRE
BIT-gitlab-2026-87719 · OSV
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