CVE-2026-2104 json
Authorization Bypass Through User-Controlled Key in GitLab
published 7mo ago modified 2mo ago also BIT-gitlab-2026-2104 , EUVD-2026-20797
- cvss
- 4.3
- 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 25%
- public exploits
- 0
- none known
Summary
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.2 before 18.8.9, 18.9 before 18.9.5, and 18.10 before 18.10.3 that could have allowed an authenticated user to access confidential issues assigned to other users via CSV export due to insufficient authorization checks.
Patch / fix
- bitnami gitlab 18.8.9, 18.9.5, 18.10.3
- GitLab GitLab 18.8.9, 18.9.5, 18.10.3
Is CVE-2026-2104 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 7mo ago
Exploit prediction
0.32% chance of exploitation in the next 30 days, higher than 25% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- hackerone.com https://hackerone.com/reports/3541476 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
| OSV | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| bitnami | gitlab | >=18.2.0, <18.8.9 >=18.9.0, <18.9.5 >=18.10.0, <18.10.3 |
18.8.9 18.9.5 18.10.3 |
Affected products
- GitLab GitLab
Classification
- Weakness
-
- CWE-639 Authorization Bypass Through User-Controlled Key
- Technology feeds
References
-
hackerone.com
/reports/3541476
technical-description, exploit, permissions-required, web
-
about.gitlab.com
/releases/2026/04/08/patch-release-gitlab-18-10-3-released/
release-notes, vendor-advisory, advisory
-
gitlab.com
/gitlab-org/gitlab/-/work_items/589021
broken-link, web
-
nvd.nist.gov
/vuln/detail/CVE-2026-2104
web
Sources
- CVE List CVE-2026-2104
- NVD CVE-2026-2104
- OSV BIT-gitlab-2026-2104
Fencer Intel 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.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.