CVE-2026-15423

HIGH 8.5 ALL-YEARS

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

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 19.0 before 19.0.6, 19.1 before 19.1.4, and 19.2 before 19.2.2 that under certain conditions could have allowed an authenticated user with developer-role permissions to execute CI/CD pipelines on a protected branch without the required push permissions due to improper authorization in pipeline reference validation.

ELEVATED IMPACT

Severe if exploited (CVSS 8.5), but no confirmed exploitation. Patch on a normal cadence.

Exploitation likelihood

0.4%chance of exploitation in 30 days · 34th percentile

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

Impact if exploited

8.5CVSS 3.1 · HIGH · CNA

ConfidentialityLow
IntegrityHigh
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:C/C:L/I:H/A:N

References and research data (JSON)

Known Affected Software Configurations

Vendor	Product	Version range
Gitlab	Gitlab	≥ 19.0.0 and < 19.0.6
Gitlab	Gitlab	≥ 19.0.0 and < 19.0.6
Gitlab	Gitlab	≥ 19.1.0 and < 19.1.4
Gitlab	Gitlab	≥ 19.1.0 and < 19.1.4
Gitlab	Gitlab	≥ 19.2.0 and < 19.2.2
Gitlab	Gitlab	≥ 19.2.0 and < 19.2.2

All CVSS metrics

HIGH 8.5 v3.1 · CNA Primary
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:N
HIGH 8.5 v3.1 · NVD Secondary
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:N

References

Exploit-tagged references (not proof of a PoC)

https://hackerone.com/reports/3832069 technical-descriptionexploitpermissions-requiredPermissions RequiredCVE record · GitLab · Updated 2026-08-12T18:05:50.271Z
NVD · CVE-2026-15423 · Updated 2026-08-19T16:44:22.503

Advisories

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-57393 ADVISORYEUVD · EUVD-2026-57393

Technical & other

https://gitlab.com/gitlab-org/gitlab/-/work_items/605705 Broken LinkCVE record · GitLab · Updated 2026-08-12T18:05:50.271Z
NVD · CVE-2026-15423 · Updated 2026-08-19T16:44:22.503
https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-2-2-released/ Release NotesCVE record · GitLab · Updated 2026-08-12T18:05:50.271Z
NVD · CVE-2026-15423 · Updated 2026-08-19T16:44:22.503

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