CVE-2026-5309 json
Authorization Bypass Through User-Controlled Key in GitLab
published 2026-06-25 4 mo ago modified 2026-09-08 2 mo ago also BIT-gitlab-2026-5309 , EUVD-2026-39175
- cvss
- 5.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 28%
- public exploits
- 0
- none known
Summary
GitLab has remediated an issue in GitLab EE affecting all versions from 18.6 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 to read or modify another group's virtual registry cleanup policy settings without authorization.
Patch / fix
- bitnami gitlab 18.11.6, 19.0.3, 19.1.1
- GitLab GitLab 18.11.6, 19.0.3, 19.1.1
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 4 mo ago
Exploit prediction
0.35% chance of exploitation in the next 30 days, higher than 28% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- hackerone.com https://hackerone.com/reports/3628793 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N |
| OSV | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| bitnami | gitlab | >=18.6.0, <18.11.6 >=19.0.0, <19.0.3 >=19.1.0, <19.1.1 |
18.11.6 19.0.3 19.1.1 |
Affected products
- GitLab GitLab
Classification
- Weakness
-
- CWE-639 Authorization Bypass Through User-Controlled Key
- Technology feeds
References
-
hackerone.com
/reports/3628793
technical-description, exploit, permissions-required, web
-
docs.gitlab.com
/releases/patches/patch-release-gitlab-19-1-1-released/
release-notes, vendor-advisory, advisory
-
gitlab.com
/gitlab-org/gitlab/-/work_items/595468
broken-link, web
-
nvd.nist.gov
/vuln/detail/CVE-2026-5309
web
Sources
- CVE List CVE-2026-5309
- NVD CVE-2026-5309
- OSV BIT-gitlab-2026-5309
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.