CVE-2026-6896 json
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab
published 4mo ago modified 17d ago also BIT-gitlab-2026-6896 , EUVD-2026-42407
- cvss
- 8.7
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 34%
- public exploits
- 0
- none known
Summary
GitLab has remediated an issue in GitLab EE affecting all versions from 13.11 before 18.11.7, 19.0 before 19.0.4, and 19.1 before 19.1.2 that under certain conditions could have allowed an authenticated user with developer-role permissions to execute arbitrary scripts in another user's browser session due to improper sanitization of user-supplied input.
Patch / fix
- bitnami gitlab 18.11.7, 19.0.4, 19.1.2
- GitLab GitLab 18.11.7, 19.0.4, 19.1.2
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Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 4mo ago
Exploit prediction
0.40% chance of exploitation in the next 30 days, higher than 34% of all scored CVEs (FIRST EPSS, 2026-11-11).
Exploits and checks
- hackerone.com https://hackerone.com/reports/3682085 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.7 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N |
| NVD | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
| OSV | 3.1 | 8.7 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| bitnami | gitlab | >=13.11.0, <18.11.7 >=19.0.0, <19.0.4 >=19.1.0, <19.1.2 |
18.11.7 19.0.4 19.1.2 |
Affected products
- GitLab GitLab
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
- Technology feeds
References
-
hackerone.com
/reports/3682085
technical-description, exploit, permissions-required, web
-
docs.gitlab.com
/releases/patches/patch-release-gitlab-19-1-2-released/
vendor-advisory, advisory
-
gitlab.com
/gitlab-org/gitlab/-/work_items/597887
broken-link, web
-
nvd.nist.gov
/vuln/detail/CVE-2026-6896
web
Sources
- CVE List CVE-2026-6896
- NVD CVE-2026-6896
- OSV BIT-gitlab-2026-6896
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