CVE-2026-87719
Critical
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.
SeverityCritical
CVSS9.9
Exploit probability—
Product
Gitlab
PublishedSep 12, 2026
First seenSep 12, 2026
Weakness typeCWE-502Deserialization of untrusted data
How to fix
Update
- gitlab gitlab18.11.12, 19.0.9, 19.1.8, 19.2.6, 19.3.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| gitlab gitlab | 18.3.0 ≤ v < 18.11.12, 19.0.0 ≤ v < 19.0.9, 19.1.0 ≤ v < 19.1.8, 19.2.0 ≤ v < 19.2.6, 19.3.0 ≤ v < 19.3.2 | 18.11.12, 19.0.9, 19.1.8, 19.2.6, 19.3.2 |
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