CVE-2026-87719
CriticalGitLab has remediated an issue in GitLab EE affecting all versions from 18.3 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 S
Published Sep 12, 2026 · Updated Sep 28, 2026 · Also known as EUVD-2026-76778, GHSA-prp4-5w2g-8v2c
Key Facts
Patch in the next maintenance window- CVE-2026-87719 is a critical-severity vulnerability (CVSS 9.9 v3.1) affecting GitLab, gitlab-rails-19.1 (minimos), gitlab-rails-19.2 (minimos) and 1 more product.
- It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
- EPSS estimates a 0.6% probability of exploitation in the next 30 days.
- Fixed versions are available, including GitLab 19.1.8, GitLab 19.2.6, GitLab 19.3.2.
- Brandefense priority: patch in the next maintenance window, because of its high severity, although no exploitation is known.
CVSS v3.1
9.9
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
0.6%
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
None known
Get the full CVE-2026-87719 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
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.
Affected Products
6 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| GitLabGitlab | >= 18.3 | 19.1.8 |
| gitlab-rails-19.1minimos | See advisory | 19.1.8-r0 |
| gitlab-rails-19.2minimos | See advisory | 19.2.6-r0 |
| gitlab-rails-19.3minimos | See advisory | 19.3.2-r0 |
Patched Releases
GitLab
19.1.8, 19.2.6, 19.3.2, 18.11.12, 19.0.9
gitlab-rails-19.1
19.1.8-r0
gitlab-rails-19.2
19.2.6-r0
gitlab-rails-19.3
19.3.2-r0
Timeline
Publicly disclosed
Sep 12, 2026
Last updated
Sep 28, 2026
Weakness Type
- CWE-502 Deserialization of Untrusted Data
References
FAQ
Common Questions.
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 sen…
Affected: GitLab versions >= 18.3; gitlab-rails-19.1 (minimos); gitlab-rails-19.2 (minimos), among others. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including GitLab 19.1.8, GitLab 19.2.6, GitLab 19.3.2.
Brandefense priority: patch in the next maintenance window, because of its high severity, although no exploitation is known.
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