CVE-2026-3093 json
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab
published 2026-07-29 3 mo ago modified 2026-09-08 2 mo ago also BIT-gitlab-2026-3093 , EUVD-2026-50486
- cvss
- 4.7
- 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 21%
- public exploits
- 0
- none known
Summary
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 14.0 before 19.0.5, 19.1 before 19.1.3, and 19.2 before 19.2.1 that under certain conditions could have allowed an attacker to execute arbitrary JavaScript in another user's browser via a crafted URL, due to improper sanitization of user-controlled input.
Patch / fix
- bitnami gitlab 19.0.5, 19.1.3, 19.2.1
- GitLab GitLab 19.0.5, 19.1.3, 19.2.1
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 3 mo ago
Exploit prediction
0.29% chance of exploitation in the next 30 days, higher than 21% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- hackerone.com https://hackerone.com/reports/3539833 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.7 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N |
| OSV | 3.1 | 4.7 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| bitnami | gitlab | >=14.0.0, <19.0.5 >=19.1.0, <19.1.3 >=19.2.0, <19.2.1 |
19.0.5 19.1.3 19.2.1 |
Affected products
- GitLab GitLab
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
- Technology feeds
References
-
hackerone.com
/reports/3539833
technical-description, exploit, permissions-required, web
-
docs.gitlab.com
/releases/patches/patch-release-gitlab-19-2-1-released/
release-notes, vendor-advisory, advisory
-
gitlab.com
/gitlab-org/gitlab/-/work_items/591274
broken-link, web
-
nvd.nist.gov
/vuln/detail/CVE-2026-3093
web
Sources
- CVE List CVE-2026-3093
- NVD CVE-2026-3093
- OSV BIT-gitlab-2026-3093
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.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.