CVE-2026-1747

MEDIUM 4.3

Authentication Bypass Using an Alternate Path or Channel in GitLab

CVSS Score

4.3

EPSS Score

0.0%

EPSS Percentile

0th

GitLab has remediated an issue in GitLab EE affecting all versions from 17.11 before 18.7.5, 18.8 before 18.8.5, and 18.9 before 18.9.1 that, under certain conditions, could have allowed Developer-role users with insufficient privileges to make unauthorized modifications to protected Conan packages.

CWE	CWE-288
Vendor	gitlab
Product	gitlab
Ecosystems	DevTools
Industries	Technology
Published	Feb 25, 2026
Last Updated	Feb 26, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

None

Affected Versions

GitLab / GitLab

17.11 < 18.7.5 18.8 < 18.8.5 18.9 < 18.9.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

gitlab.com: https://gitlab.com/gitlab-org/gitlab/-/issues/588385 hackerone.com: https://hackerone.com/reports/3533088 about.gitlab.com: https://about.gitlab.com/releases/2026/02/25/patch-release-gitlab-18-9-1-released/

Credits

Thanks [modhanami](https://hackerone.com/modhanami) for reporting this vulnerability through our HackerOne bug bounty program