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PatchSiren cyber security CVE debrief

CVE-2026-44733 opf CVE debrief

CVE-2026-44733 is a medium-severity vulnerability in OpenProject, an open-source, web-based project management software. The vulnerability, classified as a business logic error, allows attackers to bypass password requirements through a PATCH request to /api/v3/users/me. This is possible due to a password validation flaw in the change password behavior, which can be exploited with an active session takeover. The vulnerability has been fixed in OpenProject versions 17.3.2 and 17.4.0. Users of affected versions should update to a patched version to prevent potential attacks.

Vendor
opf
Product
openproject
CVSS
MEDIUM 5.9
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-26
Original CVE updated
2026-06-29
Advisory published
2026-06-26
Advisory updated
2026-06-29

Who should care

Administrators and users of OpenProject versions prior to 17.3.2 and 17.4.0 should be aware of this vulnerability and take steps to mitigate it. This includes updating to a patched version and monitoring for any suspicious activity. Additionally, users should be cautious when using public computers or unsecured networks to access OpenProject.

Technical summary

CVE-2026-44733 is a business logic error in OpenProject that allows attackers to bypass password requirements. The vulnerability exists in the change password behavior and can be exploited through a PATCH request to /api/v3/users/me. An attacker would need an active session takeover to exploit this vulnerability. The CVSS score for this vulnerability is 5.9, indicating a medium level of severity. The vulnerability has been fixed in OpenProject versions 17.3.2 and 17.4.0.

Defensive priority

Defenders should prioritize patching OpenProject instances to versions 17.3.2 or 17.4.0. In addition to patching, defenders should monitor for suspicious activity, such as unusual login attempts or changes to user accounts.

Recommended defensive actions

  • Update OpenProject to version 17.3.2 or 17.4.0
  • Monitor for suspicious activity, such as unusual login attempts or changes to user accounts
  • Implement additional security measures, such as multi-factor authentication
  • Conduct regular security audits and vulnerability assessments
  • Educate users on the importance of password security and best practices

Evidence notes

The CVE-2026-44733 vulnerability was reported through the National Vulnerability Database (NVD) and is classified as a business logic error. The vulnerability has a CVSS score of 5.9 and is considered medium severity. The vulnerability was fixed in OpenProject versions 17.3.2 and 17.4.0. Limited information is available on potential exploits or attacks.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-44733 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-44733

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-44733 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-44733

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.