TI-2026-59040 Aliases CVE-2026-86254 GHSA-qc8h-h7c3-v2gh

wger Incomplete Authorization Fix Cross-Tenant Account Deletion

MEDIUM 60CWE-862Published 2026-09-06 · Updated 2026-09-08

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: High
Attack requirements: Present
Impact type: Security bypass
Confidentiality · integrity · availability: None · High · High
Fix status: No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-862.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.0037 31st percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
wger-project	wger	up to master	—	No fix listed	CNA

wger Vendorwger-project Affected up to master Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:wger:wger::::::::	—	—	wger-project

cpe:2.3:a:wger:wger:*:*:*:*:*:*:*:* Versions — — ·wger-project

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-86254
2026-10-03 Alias added: GHSA-qc8h-h7c3-v2gh

References

Advisory 1

GitHub Security Advisory (GHSA-mw8f-w6p8-xrf4)

TI-2026-32005 wger: cross-tenant password reset and plaintext disclosure via gym=None bypass CVSS 3.1CRITICAL 9.9
TI-2022-02450 Improper Restriction of Excessive Authentication Attempts in wger-project/wger CVSS 3.1CRITICAL 9.8
TI-2023-20093 Cross Site Request Forgery (CSRF) vulnerability in wger Project wger Workout Manager… CVSS 3.1HIGH 8.8
TI-2026-32021 wger IDOR: Authenticated Users Can Read Others' Private Workout Session Data via Template Routine API CVSS 3.1HIGH 7.5
TI-2026-32022 wger: Privilege escalation via trainer-login session chaining allows gym trainers to impersonate gym managers CVSS 3.1HIGH 8.1
TI-2026-29226 wger has Broken Access Control in the Global Gym Configuration Update Endpoint CVSS 3.1HIGH 7.6

See all 20 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences