CVE-2026-6073
HIGH 8.7 ALL-YEARSGitLab has remediated an issue in GitLab EE affecting all versions from 18.7 before 18.9.7, 18.10 before 18.10.6, and 18.11 before 18.11.3 that could have allowed an authenticated user to execute arbitrary JavaScript in other users' browsers due to improper input sanitization.
Severe if exploited (CVSS 8.7), but no confirmed exploitation. Patch on a normal cadence.
Exploitation likelihood
0.2%chance of exploitation in 30 days · 8th percentile
Impact if exploited
8.7CVSS 3.1 · HIGH · CNA
- ConfidentialityHigh
- IntegrityHigh
- AvailabilityNone
What an attacker needs
- ✓Access: Reachable over the network — no local access needed
- ⚠Privileges: Requires a low-privilege account
- ⚠User interaction: A user must take an action (click / open a file)
- ✓Complexity: No special conditions — reliably repeatable
✓ lowers the bar for an attacker · ⚠ raises it
Proof of concept
No public PoC is currently catalogued.
Search for new PoCs
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Tracked sources are checked weekly for the full archive, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.
Data snapshot:
Weakness (CWE)
- CWE-79: : Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
References and research data (JSON)
Known Affected Software Configurations
| Vendor | Product | Version range |
|---|---|---|
| Gitlab | Gitlab | ≥ 18.7.0 and < 18.9.7 |
| Gitlab | Gitlab | ≥ 18.10.0 and < 18.10.6 |
| Gitlab | Gitlab | ≥ 18.11.0 and < 18.11.3 |
All CVSS metrics
- HIGH 8.7 v3.1 · CNA Primary
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N - HIGH 8.7 v3.1 · NVD Secondary
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N - MEDIUM 5.4 v3.1 · NVD Primary
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
References
Exploit-tagged references (not proof of a PoC)
- https://hackerone.com/reports/3655677 CVE record · GitLab · Updated 2026-05-14T05:34:07.338Z
NVD · CVE-2026-6073 · Updated 2026-06-17T11:00:16.147
Advisories
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-30234 EUVD · EUVD-2026-30234
Technical & other
- https://gitlab.com/gitlab-org/gitlab/-/work_items/596340 CVE record · GitLab · Updated 2026-05-14T05:34:07.338Z
NVD · CVE-2026-6073 · Updated 2026-06-17T11:00:16.147 - https://about.gitlab.com/releases/2026/05/13/patch-release-gitlab-18-11-3-released/ CVE record · GitLab · Updated 2026-05-14T05:34:07.338Z
NVD · CVE-2026-6073 · Updated 2026-06-17T11:00:16.147
Sources: NVD · CVE.org · All sources and attribution · EPSS