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VulnerabilityPublished Updated

CVE-2026-22601: opf openproject · Command Injection

Affects opf openprojectSource CVE Database V5

0

Not known to be exploited · CVSS 8.6 High : upgrade to 16.6.2 soon.

Data as of 26 Oct 2026, 10:12 UTC

CVSS 4.0 base score
8.6High
How severe the flaw is on the 0–10 CVSS scale.
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:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 10 Jan 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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

ProductAffectedFixed in
opfopenprojectAffected
  • <16.6.2
Fixed in
  • 16.6.2
GitHubopf/openprojectpkg:github/opf/openprojectOther threatsAffected
  • <16.6.2
Fixed in
  • 16.6.2

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

  1. Immediate upgrade of OpenProject installations to version 16.6.2 or later to apply the official patch addressing the vulnerability.
  2. Restrict administrator privileges strictly to trusted personnel and enforce strong authentication mechanisms, including multi-factor authentication (MFA), to reduce the risk of credential compromise.
  3. Audit and monitor configurations related to sendmail or other system command integrations within OpenProject to detect unauthorized changes.
  4. Implement network segmentation to isolate project management servers from critical internal networks, limiting lateral movement in case of compromise.
  5. Employ application-level input validation and sanitization controls where possible to prevent injection attacks.
  6. Conduct regular security training for administrators to recognize and prevent misuse of privileged access.
  7. Monitor logs for unusual command execution patterns or email sending activities that could indicate exploitation attempts.
  8. 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.
  9. Establish incident response procedures specifically addressing potential exploitation of administrative interfaces.
  10. 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.

References

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