CVE-2026-86254: medium-severity vulnerability in wger-project wger
wger Incomplete Authorization Fix Cross-Tenant Account Deletion
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.1epss 0.4%
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.
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
Affected products
wger-project · wgerRelated CVEs — wger-project wger
In the same product, most dangerous first.
CVE-2026-86255HIGHwger before 2.5 Uncontrolled Resource Consumption via date_sequenceEPSS 0.4%CVE-2026-43948CRITICALwger: cross-tenant password reset and plaintext disclosure via gym=None bypassEPSS 0.4%CVE-2026-40474HIGHwger has Broken Access Control in the Global Gym Configuration Update EndpointEPSS 0.3%CVE-2026-27839MEDIUMwger: IDOR in nutritional_values endpoints exposes private dietary data via direct ORM lookupEPSS 0.3%CVE-2026-27835MEDIUMwger: IDOR in RepetitionsConfig and MaxRepetitionsConfig API leak other users' workout dataEPSS 0.3%CVE-2026-27838LOWwger: IDOR via user-unscoped cache keys on routine API actions exposes workout dataEPSS 0.3%