CVE-2026-22601: opf openproject · Command Injection
Affects opf openprojectSource CVE Database V5
Not known to be exploited · CVSS 8.6 High : upgrade to 16.6.2 soon.
Data as of 26 Oct 2026, 10:12 UTC
- EPSS
- 0.3% chance of exploitation in 30 days – higher than 31% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 16.6.2
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:NExploitation evidence
Disclosed: evidence found.
CVE published 10 Jan 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade openproject and opf/openproject to 16.6.2.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| opfopenproject | Affected
| Fixed in
|
GitHubopf/openprojectpkg:github/opf/openprojectOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
- Immediate upgrade of OpenProject installations to version 16.6.2 or later to apply the official patch addressing the vulnerability.
- Restrict administrator privileges strictly to trusted personnel and enforce strong authentication mechanisms, including multi-factor authentication (MFA), to reduce the risk of credential compromise.
- Audit and monitor configurations related to sendmail or other system command integrations within OpenProject to detect unauthorized changes.
- Implement network segmentation to isolate project management servers from critical internal networks, limiting lateral movement in case of compromise.
- Employ application-level input validation and sanitization controls where possible to prevent injection attacks.
- Conduct regular security training for administrators to recognize and prevent misuse of privileged access.
- Monitor logs for unusual command execution patterns or email sending activities that could indicate exploitation attempts.
- Consider deploying runtime application self-protection (RASP) or web application firewalls (WAF) with custom rules to detect and block suspicious command injection attempts targeting OpenProject.
- Establish incident response procedures specifically addressing potential exploitation of administrative interfaces.
- Review and limit the use of sendmail or similar binaries to only necessary functions and consider alternative secure mail configurations.
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.