What is CVE-2026-27835?

CVE-2026-27835 is a medium-severity vulnerability in Wger, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 4.3/10. Published 2026-02-26.

How severe is CVE-2026-27835?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Auth bypass in Wger

CVE-2026-27835

wger is a free, open-source workout and fitness manager. In versions up to and including 2.4, `RepetitionsConfigViewSet` and `MaxRepetitionsConfigViewSet` return all users' repetition config data because their `get_queryset()` calls `.all()` instead of filtering by the authenticated user. Any registered user can enumerate every other user's workout structure. Commit 1fda5690b35706bb137850c8a084ec6a13317b64 contains a fix for the issue.

Vulnerability class: IDOR (Insecure Direct Object Reference)

Published 2026-02-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.003 (22.3th percentile), scored 2026-10-22.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 22nd percentile — 22.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.001

Affected products

Wger
Wger-Project Wger — versions <= 2.4

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

github.com/wger-project/wger/security/advisories/GHSA-xf68-8hjw-7mpm (Exploit, Vendor Advisory)
github.com/wger-project/wger/commit/1fda5690b35706bb137850c8a084ec6a13317b64 (Patch)

Frequently asked questions

What is CVE-2026-27835?: CVE-2026-27835 is a medium-severity vulnerability in Wger, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 4.3/10. Published 2026-02-26.
How severe is CVE-2026-27835?: Medium severity. CVSS v3 base score is 4.3 out of 10.