Vulnerability · Published Feb 26, 2026 · Assigned by GitHub_M

CVE-2026-27835wger: IDOR in RepetitionsConfig and MaxRepetitionsConfig API leak other users' workout data

Medium 4.3

In plain English

A medium-severity authorization bypass via user-controlled key in wger from wger-project. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 22% of all known vulnerabilities).

Severity (CVSS 3.1)4.3Medium

Exploit odds (30 days)0.3%top 77.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

wger is a free, open-source workout and fitness manager. In versions up to and including 2.4, `RepetitionsConfigViewSet` and `MaxRepetitionsConfigViewSet` return all users' repetition config data because their `get_queryset()` calls `.all()` instead of filtering by the authenticated user. Any registered user can enumerate every other user's workout structure. Commit 1fda5690b35706bb137850c8a084ec6a13317b64 contains a fix for the issue.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
PyPI	wger	no fix listed	GHSA-xf68-8hjw-7mpm
PyPI	wger	no fix listed	PYSEC-2026-3423

Affected products (as reported)

Vendor	Product	Versions
wger-project	wger	<= 2.4

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

References

https://github.com/wger-project/wger/security/advisories/GHSA-xf68-8hjw-7mpm x_refsource_CONFIRM
https://github.com/wger-project/wger/commit/1fda5690b35706bb137850c8a084ec6a13317b64 x_refsource_MISC