Vulnerability · Published Oct 13, 2026 · Assigned by GitLab

CVE-2026-78335Incorrect Authorization in GitLab

Medium 4.2

In plain English

A medium-severity incorrect authorization in GitLab from GitLab. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 9% of all known vulnerabilities).

Severity (CVSS 3.1)4.2Medium

Exploit odds (30 days)0.2%top 91.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 19.1 before 19.2.8, 19.3 before 19.3.5, and 19.4 before 19.4.2 that, under certain conditions, could have allowed an authenticated user holding a project-scoped fine-grained Personal Access Token to modify integrations belonging to a group outside the token's scope, due to incorrect authorization checks.

Affected products (as reported)

Vendor	Product	Versions
GitLab	GitLab	19.1 – before 19.2.819.3 – before 19.3.519.4 – before 19.4.2

Weakness: CWE-863 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N

References

https://gitlab.com/gitlab-org/gitlab/-/work_items/621535
HackerOne Bug Bounty Report #3893467 technical-description, exploit, permissions-required
https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-4-2-released/