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PatchSiren cyber security CVE debrief

CVE-2026-9204 GitLab CVE debrief

CVE-2026-9204 is a vulnerability in GitLab CE/EE that could allow an authenticated user to read arbitrary files from the Gitaly server and access internal network resources during repository import. This issue affects versions 18.10 before 18.10.8, 18.11 before 18.11.5, and 19.0 before 19.0.2.

Vendor
GitLab
Product
Unknown
CVSS
MEDIUM 5.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-11
Original CVE updated
2026-06-11
Advisory published
2026-06-11
Advisory updated
2026-06-11

Who should care

Users of GitLab CE/EE versions 18.10 before 18.10.8, 18.11 before 18.11.5, and 19.0 before 19.0.2 should be aware of this vulnerability and take necessary actions to remediate it.

Technical summary

The vulnerability is caused by insufficient validation of secondary URLs in GitLab CE/EE. This allows an authenticated user to read arbitrary files from the Gitaly server and access internal network resources during repository import.

Defensive priority

MEDIUM

Recommended defensive actions

  • Update to version 18.10.8, 18.11.5, or 19.0.2 or later
  • Refer to vendor documentation for more information: [ref-4](https://about.gitlab.com/releases/2026/06/10/patch-release-gitlab-19-0-2-released/)

Evidence notes

The CVE-2026-9204 record and associated details are sourced from official databases and vendor communications.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-9204 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-9204

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-9204 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-9204

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.