CVE-2026-1662
HIGH 7.5 ALL-YEARSGitLab has remediated an issue in GitLab CE/EE affecting all versions from 14.4 before 18.7.5, 18.8 before 18.8.5, and 18.9 before 18.9.1 that could have allowed an unauthenticated user to cause Denial of Service by sending specially crafted requests to the Jira events endpoint.
Severe if exploited (CVSS 7.5), but no confirmed exploitation. Patch on a normal cadence.
Exploitation likelihood
0.4%chance of exploitation in 30 days · 35th percentile
Impact if exploited
7.5CVSS 3.1 · HIGH · CNA
- ConfidentialityNone
- IntegrityNone
- AvailabilityHigh
What an attacker needs
- ✓Access: Reachable over the network — no local access needed
- ✓Privileges: No account or privileges required
- ✓User interaction: No user interaction needed
- ✓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
Search GitHub now — results may be empty or unverified.
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-770: : Allocation of Resources Without Limits or Throttling
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References and research data (JSON)
Known Affected Software Configurations
| Vendor | Product | Version range |
|---|---|---|
| Gitlab | Gitlab | ≥ 14.4.0 and < 18.7.5 |
| Gitlab | Gitlab | ≥ 14.4.0 and < 18.7.5 |
| Gitlab | Gitlab | ≥ 18.8.0 and < 18.8.5 |
| Gitlab | Gitlab | ≥ 18.8.0 and < 18.8.5 |
| Gitlab | Gitlab | 18.9.0 |
| Gitlab | Gitlab | 18.9.0 |
All CVSS metrics
- HIGH 7.5 v3.1 · CNA Primary
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - HIGH 7.5 v3.1 · NVD Secondary
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
Exploit-tagged references (not proof of a PoC)
- https://hackerone.com/reports/3519694 CVE record · GitLab · Updated 2026-02-25T20:04:59.913Z
NVD · CVE-2026-1662 · Updated 2026-06-17T10:16:16.363
Advisories
- https://about.gitlab.com/releases/2026/02/25/patch-release-gitlab-18-9-1-released/ CVE record · GitLab · Updated 2026-02-25T20:04:59.913Z
NVD · CVE-2026-1662 · Updated 2026-06-17T10:16:16.363 - https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-8722 EUVD · EUVD-2026-8722
Technical & other
- https://gitlab.com/gitlab-org/gitlab/-/issues/588206 CVE record · GitLab · Updated 2026-02-25T20:04:59.913Z
NVD · CVE-2026-1662 · Updated 2026-06-17T10:16:16.363
Sources: NVD · CVE.org · All sources and attribution · EPSS