---
id: CVE-2026-85389
title: >-
  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
summary: >-
  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 UUID…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-639
vendor: Worklenz
product: worklenz
affected:
  - worklenz < 3.0.0
published: '2026-09-03'
updated: '2026-09-14'
sourceUpdated: '2026-09-14T14:17:13.260'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-85389'
references:
  - url: 'https://github.com/Worklenz/worklenz'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/Worklenz/worklenz/blob/v3.0.0/worklenz-backend/src/middlewares/verify-task-access.ts
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/Worklenz/worklenz/commit/f088ad0e36a23bb52857b46b3d4ce2533daeb65f
    label: disclosure@vulncheck.com
  - url: 'https://github.com/Worklenz/worklenz/issues/396'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/Worklenz/worklenz/releases/tag/v3.0.0'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/worklenz-before-3.0.0-authorization-bypass-on-task-scoped-endpoints
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-14T13:04:55.202786Z'
epss: 0.00454
epssPercentile: 0.36879
ingestedAt: '2026-09-08T21:11:12.291Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.