CVE-2026-0752

HIGH 8 ALL-YEARS

Published 2026-02-25 · Last modified 2026-02-26 · GitLab · NVD: Analyzed

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 16.2 before 18.7.5, 18.8 before 18.8.5, and 18.9 before 18.9.1 that under certain circumstances, could have allowed an unauthenticated user to inject arbitrary scripts into the Mermaid sandbox UI.

ELEVATED IMPACT

Severe if exploited (CVSS 8), but no confirmed exploitation. Patch on a normal cadence.

Exploitation likelihood

0.4%chance of exploitation in 30 days · 29th percentile

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

Impact if exploited

8CVSS 3.1 · HIGH · CNA

ConfidentialityHigh
IntegrityHigh
AvailabilityNone

What an attacker needs

✓Access: Reachable over the network — no local access needed
✓Privileges: No account or privileges required
⚠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

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-79: : Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/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	≥ 16.2.0 and < 18.7.5
Gitlab	Gitlab	≥ 16.2.0 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 8 v3.1 · CNA Primary
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N
HIGH 8 v3.1 · NVD Secondary
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N
MEDIUM 6.1 v3.1 · NVD Primary
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

References

Exploit-tagged references (not proof of a PoC)

https://hackerone.com/reports/3473276 technical-descriptionexploitpermissions-requiredPermissions RequiredCVE record · GitLab · Updated 2026-02-25T20:05:19.818Z
NVD · CVE-2026-0752 · Updated 2026-06-17T10:11:19.260

Advisories

https://about.gitlab.com/releases/2026/02/25/patch-release-gitlab-18-9-1-released/ Release NotesVendor AdvisoryCVE record · GitLab · Updated 2026-02-25T20:05:19.818Z
NVD · CVE-2026-0752 · Updated 2026-06-17T10:11:19.260
https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-8720 ADVISORYEUVD · EUVD-2026-8720

Technical & other

https://gitlab.com/gitlab-org/gitlab/-/issues/585371 issue-trackingpermissions-requiredBroken LinkCVE record · GitLab · Updated 2026-02-25T20:05:19.818Z
NVD · CVE-2026-0752 · Updated 2026-06-17T10:11:19.260

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