CVE-2026-15831: Generation of Incorrect Security Tokens in GitLab
GitLab has remediated an issue in GitLab EE affecting all versions from 19.1 before 19.1.3 and 19.2 before 19.2.1 that under certain conditions could have allowed an authenticated user to bypass administrator-configured tool governance policies due to improper authorization enforcement during token generation.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 19.1.3 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 19.2.1
Event History
Frequently Asked Questions
What is the severity of CVE-2026-15831?
CVE-2026-15831 has a medium severity rating of 4.3.
How do I fix CVE-2026-15831?
To address CVE-2026-15831, upgrade to GitLab EE version 19.1.3 or 19.2.1 or later.
What issue does CVE-2026-15831 address?
CVE-2026-15831 addresses improper authorization enforcement during token generation in GitLab.
Which versions of GitLab are affected by CVE-2026-15831?
CVE-2026-15831 affects all GitLab EE versions from 19.1 before 19.1.3 and from 19.2 before 19.2.1.
What could happen if CVE-2026-15831 is exploited?
If exploited, CVE-2026-15831 could allow an authenticated user to bypass administrator-configured tool governance policies.