What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 6.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-06 · updated 2026-09-08
• Weakness: CWE-862

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.

Affected products

• wger-project wger: through master

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
• https://github.com/wger-project/wger/security/advisories/GHSA-mw8f-w6p8-xrf4

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