# CVE-2025-12983: Memory Allocation with Excessive Size Value in GitLab

> CVE-2025-12983: Memory Allocation with Excessive Size Value in GitLab. CVSS 3.5 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2025-12983
Last updated: 2026-10-19T13:10:00Z

- Published: 2025-11-15 08:13 UTC · Updated: 2026-10-19 13:10 UTC · Assigner: GitLab
- CVSS: 3.5 (CVSS 3.1) · Severity: Low · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:L
- EPSS: 0.45%, 39th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-789

## Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 16.9 before 18.3.6, 18.4 before 18.4.4, and 18.5 before 18.5.2 that could have allowed an authenticated attacker to cause a denial of service condition by submitting specially crafted markdown content with nested formatting patterns.

## Affected vendors and products

- GitLab: GitLab

## Tracked companies

- [GitLab](https://rewindex.com/company/gitlab.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2025-12983)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2025-12983)
- [https://about.gitlab.com/releases/2025/11/12/patch-release-gitlab-18-5-2-released/](https://about.gitlab.com/releases/2025/11/12/patch-release-gitlab-18-5-2-released/)
- [https://gitlab.com/gitlab-org/gitlab/-/issues/296257](https://gitlab.com/gitlab-org/gitlab/-/issues/296257)
- [https://hackerone.com/reports/3419588](https://hackerone.com/reports/3419588)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2025-12983 · Markdown: https://rewindex.com/cve/CVE-2025-12983.md · JSON: https://rewindex.com/api/v1/cves/CVE-2025-12983 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:12:13.168Z