CVE-2026-27838 LOW

CVE-2026-27838: wger: IDOR via user-unscoped cache keys on routine API actions exposes workout data

Vendor Wger-Project
Product wger
Weakness CWE-639 · IDOR
Published February 26, 2026
Last update March 3, 2026

CVSS base score

3.1/10
Attack vector Network
Attack complexity High
Privileges required Low
User interaction None
Confidentiality Low
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N

What the vulnerability does

01Description

wger is a free, open-source workout and fitness manager. Five routine detail action endpoints check a cache before calling `self.get_object()`. In versions up to and including 2.4, ache keys are scoped only by `pk` — no user ID is included. When a victim has previously accessed their routine via the API, an attacker can retrieve the cached response for the same PK without any ownership check. Commit e964328784e2ee2830a1991d69fadbce86ac9fbf contains a patch for the issue.

Key dates

02Disclosure timeline

February 26, 2026 CVE published
March 3, 2026 Record updated