CVE-2022-4205 — In Gitlab EE/CE before 15

In Gitlab EE/CE before 15.6.1, 15.5.5 and 15.4.6 using a branch with a hexadecimal name could override an existing hash.

01What is this vulnerability?

In Gitlab EE/CE before 15.6.1, 15.5.5 and 15.4.6 using a branch with a hexadecimal name could override an existing hash.

02Affected products

Vendor	Product	Versions
GitLab	GitLab	>=1.0, <12.9.8, >=15.5, <15.5.5, >=15.6, <15.6.1

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-01-27T00:00:00.000Z
• Last modified: 2025-03-27T20:21:18.593Z

09References

• gitlab.com — https://gitlab.com/gitlab-org/gitlab/-/issues/374082
• gitlab.com — https://gitlab.com/gitlab-org/cves/-/blob/master/2022/CVE-2022-4205.json