Type Vulnerability
GitLab has addressed a security issue in GitLab EE impacting versions from 11.10 up to but not including 19.1.7, 19.2 up to but not including 19.2.5, and 19.3 up to but not including 19.3.1.
GitLab
GitLab has remediated an issue in GitLab EE affecting all versions from 11.10 before 19.1.7, 19.2 before 19.2.5, and 19.3 before 19.3.1 that, under certain conditions, an authenti…
CVE-2026-18252
What this means
This is rated high severity (7.3 out of 10). There is no confirmed exploitation of it yet. Ask IT whether Gitlab Gitlab is in your estate, and treat that as the priority.
Full vendor description
GitLab has remediated an issue in GitLab EE affecting all versions from 18.9 before 19.1.7, 19.2 before 19.2.5, and 19.3 before 19.3.1 that, under certain conditions, an authenticated user with developer-role permissions could have executed arbitrary commands in a CI context, due to the Claude agent processing configuration from a user-controlled source.
Scoring and exploitation
7.3/ 10
CVSS 3.1 base scoreHigh
Exploitable over the network with a low-privilege account, but only if a user takes an action, such as opening a file or link. High impact on confidentiality and integrity.
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
Exploitability
Longer bar: easier to attack
Attack vectorNetworkAV:N
Attack complexityLowAC:L
Privileges requiredLowPR:L
User interactionRequiredUI:R
ScopeUnchangedS:U
Impact
Longer bar: more harm
ConfidentialityHighC:H
IntegrityHighI:H
AvailabilityNoneA:N
- ~0.3% estimated chance of attack in 30 daysModel estimate (): a probability signal, not confirmed exploitation
- Exploited in the wild
- Not confirmed in the
- Not reported
Weaknesses
CWE-829
Affected products ()
- Gitlab Gitlab
Show the raw CPE strings (2)
- cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*
- cpe:2.3:a:gitlab:gitlab:19.3.0:*:*:*:enterprise:*:*:*
References
3 links from the CVE record, grouped by site; the vendor's advisory comes first.
docs.gitlab.com1 linkVendor advisory
- patch-release-gitlab-19-3-1-released (opens in a new tab)Release Notes · Vendor Advisory
gitlab.com1 link
- 607342 (opens in a new tab)Issue Tracking
hackerone.com1 link
- 3863650 (opens in a new tab)Permissions Required · Third Party Advisory