CVE-2026-1659
HighSummary
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 9.0 before 18.9.7, 18.10 before 18.10.6, and 18.11 before 18.11.3. This issue could have allowed an unauthenticated user to cause denial of service by sending specially crafted requests due to insufficient input validation.
Risk Assessment
The organization may be exposed to denial of service attacks, which could lead to downtime in GitLab services. This may affect application availability and user trust.
Recommendation
It is recommended to upgrade to the latest version of GitLab to mitigate this vulnerability. A security audit should also be conducted to ensure that other potential vulnerabilities are addressed.
Other vulnerabilities in GitLab CE/EE
See all- CVE-2025-14870High
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.5 before 18.9.7, 18.10 before 18.10.6, and 18.11 before 18.11.3. This issue could have allowed an unauthenticated user to cause denial of service by sending specially crafted JSON payloads due to insufficient input validation.
- CVE-2025-14869High
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.5 before 18.9.7, 18.10 before 18.10.6, and 18.11 before 18.11.3. This issue could have allowed an unauthenticated user to cause denial of service by sending specially crafted payloads on certain API endpoints.
- CVE-2023-3364High
An issue has been discovered in GitLab CE/EE affecting all versions from 8.14 before 16.0.8, from 16.1 before 16.1.3, and from 16.2 before 16.2.2. A Denial of Service (DoS) attack was possible via crafted payloads using AutolinkFilter at the preview_markdown endpoint.
- CVE-2026-6336Medium
A missing authorization check in GitLab CE/EE allows an unauthorized user to view project import source information. Affected versions are from 16.6 to 19.0.4, 19.1 to 19.1.2, and 19.2 to 19.2.0.
- CVE-2025-14562Low
GitLab CE/EE has improper authorization checks on merge request collaboration settings, allowing an authenticated user with developer role to commit changes to a project after being removed as a member. Affected versions are 10.6 through 19.0.4, 19.1 through 19.1.2, and 19.2 through 19.2.0.
- CVE-2026-2238Medium
A vulnerability in GitLab CE/EE allowed an unauthenticated user to view confidential issue references in public projects under certain conditions due to improper authorization checks. Affected versions: 17.5 to 18.11.6, 19.0 to 19.0.3, and 19.1 to 19.1.1.
- CVE-2026-1606Medium
A vulnerability in GitLab CE/EE allows an authenticated user to conceal content within a Snippet due to improper input validation. The issue affects versions from 14.8 before 18.11.6, 19.0 before 19.0.3, and 19.1 before 19.1.1.
- CVE-2026-12635Unknown
A vulnerability in GitLab CE/EE allows an authenticated user with maintainer role to make requests to internal network resources via mirror synchronization due to improper URL validation. Affected versions: from 8.3 before 18.11.6, 19.0 before 19.0.3, and 19.1 before 19.1.1.
- CVE-2026-10712High
A vulnerability in GitLab CE/EE allows an unauthenticated attacker to execute arbitrary JavaScript in a user's browser session due to improper path validation. Affects versions from 18.10 before 18.11.6, 19.0 before 19.0.3, and 19.1 before 19.1.1.
- CVE-2026-9694Low
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 15.9 before 18.10.8, 18.11 before 18.11.5, and 19.0 before 19.0.2. Under certain conditions, an unauthenticated user could impersonate the GitLab Support Bot and inject arbitrary content via a specially crafted Service Desk email reply due to improper neutralization in email template processing.
Original NVD description (English source)
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 9.0 before 18.9.7, 18.10 before 18.10.6, and 18.11 before 18.11.3 that could have allowed an unauthenticated user to cause denial of service by sending specially crafted requests due to insufficient input validation.