Vulnerability · Published May 12, 2026 · Assigned by GitHub_M

CVE-2026-43948wger: cross-tenant password reset and plaintext disclosure via gym=None bypass

Critical 9.9

In plain English

A critical-severity incorrect authorization 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 0.4% (higher than 31% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.9Critical

Exploit odds (30 days)0.4%top 68.8% 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. Prior to 2.6, the reset_user_password and gym_permissions_user_edit views in wger perform a gym-scope authorization check using Python object comparison (!=) that evaluates None != None as False, silently bypassing the guard when both the attacker and victim have no gym assignment (gym=None). A user with gym.manage_gym permission and gym=None can reset the password of any other gym=None user; the new plaintext password is returned verbatim in the HTML response body, enabling one-shot full account takeover. The victim's original password is invalidated, locking them out permanently. This vulnerability is fixed in 2.6.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
PyPI	wger	2.6	GHSA-mhc8-p3jx-84mm
PyPI	wger	2.6	PYSEC-2026-574

Affected products (as reported)

Vendor	Product	Versions
wger-project	wger	< 2.6

Weakness: CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

References

https://github.com/wger-project/wger/security/advisories/GHSA-mhc8-p3jx-84mm x_refsource_CONFIRM