What is CVE-2026-27839?

CVE-2026-27839 is a medium-severity vulnerability in Wger-project Wger, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 4.3/10. Published 2026-02-26.

How severe is CVE-2026-27839?

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

Auth bypass in Wger-project Wger

CVE-2026-27839

wger is a free, open-source workout and fitness manager. In versions up to and including 2.4, three `nutritional_values` action endpoints fetch objects via `Model.objects.get(pk=pk)` — a raw ORM call that bypasses the user-scoped queryset…

Vulnerability class: IDOR (Insecure Direct Object Reference)

EPSS: 0.000 (12.2th percentile) — read the EPSS interpretation.

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.

Affected products

Wger-project Wger — versions <= 2.4

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

https://github.com/wger-project/wger/security/advisories/GHSA-g8gc-6c4h-jg86 (x_refsource_CONFIRM)
https://github.com/wger-project/wger/commit/29876a1954fe959e4b58ef070170e81703dab60e (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-27839?: CVE-2026-27839 is a medium-severity vulnerability in Wger-project Wger, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 4.3/10. Published 2026-02-26.
How severe is CVE-2026-27839?: Medium severity. CVSS v3 base score is 4.3 out of 10.