Auth bypass in Wger-Project Wger
CVE-2026-43976
wger is a free, open-source workout and fitness manager. Prior to version 2.6, five gym management views in wger apply a flawed gym-scope guard (`gym_a != gym_b`) that silently passes when both operands are `None`. A trainer with `gym.gym_trainer` and `gym.add_adminusernote` permissions and no gym assignment (`gym=None`) can read private admin notes, uploaded documents, gym contracts, user configuration, and user permission data for **any other unaffiliated user** on the instance. The subsequent querysets filter only on the attacker-supplied `member_id` with no secondary gym-scoped validation, so all records are disclosed. Version 2.6 fixes the issue.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Wger-Project Wger — versions < 2.6
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-43976?
- CVE-2026-43976 is a high-severity vulnerability in Wger-Project Wger, classified under Incorrect Authorization. CVSS score: 7.1/10. Published 2026-10-07.
- How severe is CVE-2026-43976?
- High severity. CVSS v3 base score is 7.1 out of 10.