# CVE-2026-12635: Reliance on Reverse DNS Resolution for a Security-Critical Action in GitLab

> CVE-2026-12635: Reliance on Reverse DNS Resolution for a Security-Critical Action in GitLab. CVSS 0.0 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-12635
Last updated: 2026-06-26T18:29:37Z

- Published: 2026-06-25 04:33 UTC · Updated: 2026-06-26 18:29 UTC · Assigner: GitLab
- CVSS: 0.0 (CVSS 3.1) · Severity: None · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:N
- EPSS: 0.25%, 16th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-350

## Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 8.3 before 18.11.6, 19.0 before 19.0.3, and 19.1 before 19.1.1 that under certain conditions could have allowed an authenticated user with maintainer-role permissions to make requests to internal network resources through mirror synchronization due to improper URL validation.

## Affected vendors and products

- GitLab: GitLab

## Tracked companies

- [GitLab](https://rewindex.com/company/gitlab.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-12635)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-12635)
- [https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-1-1-released/](https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-1-1-released/)
- [https://gitlab.com/gitlab-org/gitlab/-/work\_items/594321](https://gitlab.com/gitlab-org/gitlab/-/work_items/594321)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-12635 · Markdown: https://rewindex.com/cve/CVE-2026-12635.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-12635 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:15:17.259Z