CVE-2026-18433

MEDIUM 4.3 ALL-YEARS

Published 2026-08-12 · Last modified 2026-08-13 · GitLab · NVD: Analyzed

GitLab has remediated an issue in GitLab EE affecting all versions from 19.1 before 19.1.4 and 19.2 before 19.2.2 that under certain conditions could have allowed an authenticated user to read policy configuration belonging to a namespace they were not authorized to access, due to incorrect authorization checks in a GraphQL query.

LIMITED SIGNALS

No known exploitation, public exploit, or elevated probability at this time. Track for changes.

Exploitation likelihood

0.4%chance of exploitation in 30 days · 33rd percentile

○ In CISA KEV○ Catalogued PoC◆ SSVC: exploitation none, automatable no

Impact if exploited

4.3CVSS 3.1 · MEDIUM · CNA

ConfidentialityLow
IntegrityNone
AvailabilityNone

What an attacker needs

✓Access: Reachable over the network — no local access needed
⚠Privileges: Requires a low-privilege account
✓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: 2026-10-26T04:59:11.116Z

Affected

Vendors Gitlab

Products Gitlab

Weakness (CWE)

CWE-863: : Incorrect Authorization

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

References and research data (JSON)

Known Affected Software Configurations

Vendor	Product	Version range
Gitlab	Gitlab	≥ 19.1.0 and < 19.1.4
Gitlab	Gitlab	≥ 19.2.0 and < 19.2.2

All CVSS metrics

MEDIUM 4.3 v3.1 · CNA Primary
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
MEDIUM 4.3 v3.1 · NVD Secondary
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

References

Exploit-tagged references (not proof of a PoC)

https://hackerone.com/reports/3776182 technical-descriptionexploitpermissions-requiredPermissions RequiredCVE record · GitLab · Updated 2026-08-12T19:04:26.420Z
NVD · CVE-2026-18433 · Updated 2026-08-19T16:32:42.263

Advisories

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-57435 ADVISORYEUVD · EUVD-2026-57435

Technical & other

https://gitlab.com/gitlab-org/gitlab/-/work_items/607556 Broken LinkCVE record · GitLab · Updated 2026-08-12T19:04:26.420Z
NVD · CVE-2026-18433 · Updated 2026-08-19T16:32:42.263
https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-2-2-released/ Release NotesCVE record · GitLab · Updated 2026-08-12T19:04:26.420Z
NVD · CVE-2026-18433 · Updated 2026-08-19T16:32:42.263

Sources: NVD · CVE.org · All sources and attribution · EPSS