CVE-2026-27838CWE-639

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

Low · published February 26, 2026

CVSS v3.1
3.1
EPSS
0%
Percentile
16.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
3.1 · LOW
Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00256 · 16.3th percentile
Weakness
CWE-639 · Authorization Bypass Through User-Controlled Key
Published
2026-02-26T22:04Z
EPSS history
Timeline
  • 26 FEB 22:04Z
    wger: IDOR via user-unscoped cache keys on routine API actions exposes workout data
    cvelistv5