Vulnerability · Published Sep 3, 2026 · Assigned by VulnCheck

CVE-2026-85389Worklenz before 3.0.0 Authorization Bypass on Task-Scoped Endpoints

Medium 6.5

In plain English

A medium-severity authorization bypass via user-controlled key in worklenz from Worklenz. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.5%top 60.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Worklenz before 3.0.0 fails to verify task ownership by organization when resolving task-scoped API endpoints, allowing authenticated users to access another tenant's task data. Attackers can query task endpoints with arbitrary task UUIDs to retrieve work logs, comments, attachments, and project insights belonging to other organizations.

Affected products (as reported)

Vendor	Product	Versions
Worklenz	worklenz	0 – before 3.0.0

Weakness: CWE-639 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

References

GitHub Issue #396 issue-tracking
https://github.com/Worklenz/worklenz product
https://github.com/Worklenz/worklenz/commit/f088ad0e36a23bb52857b46b3d4ce2533daeb65f patch
https://github.com/Worklenz/worklenz/blob/v3.0.0/worklenz-backend/src/middlewares/verify-task-access.ts technical-description
Worklenz v3.0.0 Release Notes release-notes
VulnCheck Advisory: Worklenz before 3.0.0 Authorization Bypass on Task-Scoped Endpoints third-party-advisory