PT-2026-7516 · Gitlab · Gitlab Ce/Ee

Maksyche · CVE-2026-1456 · Published 2026-02-11 · Updated 2026-02-16

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions GitLab CE/EE versions 18.7 through 18.7.3 GitLab CE/EE versions 18.8 through 18.8.3

Description An unauthenticated user could cause a denial of service through CPU exhaustion by submitting specially crafted markdown files. These files trigger exponential processing during markdown preview, leading to resource exhaustion.

Recommendations Update GitLab CE/EE to version 18.7.4 or later. Update GitLab CE/EE to version 18.8.4 or later.

Exploit

Fix

DoS

Allocation of Resources Without Limits

Weakness Enumeration

CWE-770

Related Identifiers

BIT-GITLAB-2026-1456

CVE-2026-1456

Affected Products

Gitlab Ce/Ee

References · 12

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/1xxx/CVE-2026-1456.json · Exploit
• 🔥 https://hackerone.com/reports/3517928 · Exploit
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-1456 · Vendor Advisory
• https://about.gitlab.com/releases/2026/02/10/patch-release-gitlab-18-8-4-released · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-1456 · Security Note
• https://osv.dev/vulnerability/CVE-2026-1456 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-1456 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-1456 · Security Note
• https://osv.dev/vulnerability/BIT-gitlab-2026-1456 · Vendor Advisory
• https://twitter.com/CVEnew/status/2021554581843345672 · Twitter Post
• https://gitlab.com/gitlab-org/gitlab/-/issues/587688 · Note
• https://t.me/cveNotify/151895 · Telegram Post