CVE-2026-100755
MEDIUM 4.6GitLab has remediated an issue in GitLab CE/EE affecting all versions from 16.2 before 19.2.8, 19.3 before 19.3.5, and 19.4 before 19.4.2 that, under certain deployment configurations, could have allowed an authenticated user to poison cached page content served to other users due to improper cache key construction.
No known exploitation, public exploit, or elevated probability at this time. Track for changes.
Exploitation likelihood
0.1%chance of exploitation in 30 days · 0th percentile
Impact if exploited
4.6CVSS 3.1 · MEDIUM
- ConfidentialityLow
- IntegrityLow
- AvailabilityLow
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: Needs a race window or specific setup
✓ 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 daily for recent CVEs, 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-349: : Acceptance of Extraneous Untrusted Data With Trusted Data
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L
References and research data (JSON)
Known Affected Software Configurations
| Vendor | Product | Version range |
|---|---|---|
| Gitlab | Gitlab | ≥ 16.2.0 and < 19.2.8 |
| Gitlab | Gitlab | ≥ 16.2.0 and < 19.2.8 |
| Gitlab | Gitlab | ≥ 19.3.0 and < 19.3.5 |
| Gitlab | Gitlab | ≥ 19.3.0 and < 19.3.5 |
| Gitlab | Gitlab | ≥ 19.4.0 and < 19.4.2 |
| Gitlab | Gitlab | ≥ 19.4.0 and < 19.4.2 |
All CVSS metrics
- MEDIUM 4.6 v3.1 · CNA Primary
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L - MEDIUM 4.6 v3.1 · NVD Secondary
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L
References
Advisories
- https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-4-2-released/ CVE record · GitLab · Updated 2026-10-13T01:05:31.161Z
NVD · CVE-2026-100755 · Updated 2026-10-14T19:17:00.220 - https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-98211 EUVD · EUVD-2026-98211
Technical & other
- https://gitlab.com/gitlab-org/gitlab/-/work_items/627507 CVE record · GitLab · Updated 2026-10-13T01:05:31.161Z
NVD · CVE-2026-100755 · Updated 2026-10-14T19:17:00.220