What’s Vulnerable › Vulnerabilities

CVE-2021-22218

• Severity: low (CVSS 2.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-06-08 · updated 2026-06-17
• Weakness: CWE-295

Description

All versions of GitLab CE/EE starting from 12.8 before 13.10.5, all versions starting from 13.11 before 13.11.5, and all versions starting from 13.12 before 13.12.2 were affected by an issue in the handling of x509 certificates that could be used to spoof author of signed commits.

Affected products

• GitLab: from 12.8.0 before 13.10.5; from 13.11.0 before 13.11.5; from 13.12.0 before 13.12.2 — fixed in 13.10.5, 13.11.5, 13.12.2

How to fix

Upgrade to a fixed version: GitLab 13.10.5, 13.11.5, 13.12.2. Check the vendor advisory for mitigations.

References

• https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22218.json
• https://gitlab.com/gitlab-org/gitlab/-/issues/297665
• https://hackerone.com/reports/1077019
• https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22218.json
• https://gitlab.com/gitlab-org/gitlab/-/issues/297665
• https://hackerone.com/reports/1077019

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