Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-23646— OpenProject users can delete other user's session, causing them to be logged out

Quick assessment

Affected
opf openproject
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OpenProject是OpenProject开源的一个基于Web的项目管理软件。 OpenProject 16.6.5之前版本和17.0.1之前版本存在安全漏洞，该漏洞源于删除会话时未验证会话所属用户，可能导致未经身份验证的用户终止其他用户的会话。

CVSS 6.5 · Medium EPSS 0.33% · P26

Possible ATT&CK Techniques 1 AI

T1133 · External Remote Services
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-23646

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
OpenProject users can delete other user's session, causing them to be logged out
Source: CVE Program / CVE List V5
Vulnerability Description
OpenProject is an open-source, web-based project management software. Users of OpenProject versions prior to 16.6.5 and 17.0.1 have the ability to view and end their active sessions via Account Settings → Sessions. When deleting a session, it was not properly checked if the session belongs to the user. As the ID that is used to identify these session objects use incremental integers, users could iterate requests using `DELETE /my/sessions/:id` and thus unauthenticate other users. Users did not have access to any sensitive information (like browser identifier, IP addresses, etc) of other users that are stored in the session. The problem was patched in OpenProject versions 16.6.5 and 17.0.1. No known workarounds are available as this does not require any permissions or other that can temporarily be disabled.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对错误会话暴露数据元素
Source: CVE Program / CVE List V5
Vulnerability Title
OpenProject 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenProject是OpenProject开源的一个基于Web的项目管理软件。 OpenProject 16.6.5之前版本和17.0.1之前版本存在安全漏洞，该漏洞源于删除会话时未验证会话所属用户，可能导致未经身份验证的用户终止其他用户的会话。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
opf openproject < 16.6.5 -

II. Public POCs for CVE-2026-23646

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-23646

请登录查看更多情报信息。

Same Patch Batch · opf · 2026-01-19 · 3 CVEs total

CVE-2026-23625 8.7 HIGH OpenProject has stored XSS regression using attachments and script-src self
CVE-2026-23721 4.3 MEDIUM OpenProject users with "View Members" permission in any project can view all Group members

IV. Related Vulnerabilities

Same product: openproject
Same vendor: opf
Same weakness: CWE-488

V. Comments for CVE-2026-23646

No comments yet

Leave a comment