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

Severity: high (CVSS 7.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-01-10 · updated 2026-06-17
Weakness: CWE-77

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.

Affected products

opf openproject: before 16.6.2 — fixed in 16.6.2

How to fix

Upgrade to a fixed version: opf openproject 16.6.2. Check the vendor advisory for mitigations.

References

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

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