Session Management Flaw in OpenProject by OpenProject Foundation
CVE-2026-23646

6.5MEDIUM

Key Information:

Vendor

Opf

Status
Openproject
Vendor
CVE Published:
19 January 2026

What is CVE-2026-23646?

OpenProject, an open-source project management tool, suffers from a session management flaw where users can inadvertently delete other users' active sessions. In versions prior to 16.6.5 and 17.0.1, the application does not adequately verify session ownership during the deletion process. This flaw allows users to manipulate the session IDs and effectively unauthenticate other users, posing potential risks to account integrity. Although no sensitive data such as IP addresses or browser identifiers are compromised, it is important for users to upgrade to versions 16.6.5 or 17.0.1 to mitigate risks associated with this vulnerability.

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Affected Version(s)

openproject < 16.6.5 < 16.6.5

openproject = 17.0.0 = 17.0.0

References

https://github.com/opf/openproject/security/advisories/GH...
x_refsource_CONFIRM
https://github.com/opf/openproject/releases/tag/v16.6.5
x_refsource_MISC
https://github.com/opf/openproject/releases/tag/v17.0.1
x_refsource_MISC

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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