Low severity · published Feb 26, 2026
CVE-2026-27838
wger: IDOR via user-unscoped cache keys on routine API actions exposes workout data
3.5
CVSS
0.3%
EPSS
No
On KEV
Description
wger is a free, open-source workout and fitness manager. Five routine detail action endpoints check a cache before calling `self.get_object()`. In versions up to and including 2.4, ache keys are scoped only by `pk` — no user ID is included. When a victim has previously accessed their routine via the API, an attacker can retrieve the cached response for the same PK without any ownership check. Commit e964328784e2ee2830a1991d69fadbce86ac9fbf contains a patch for the issue.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 22% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WG
wger · wger-project
<= 2.4 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-27838
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-27838
Patch
https://github.com/wger-project/wger/commit/e964328784e2ee2830a1991d69fadbce86ac9fbf
Exploit
https://github.com/wger-project/wger/security/advisories/GHSA-42cr-w2gr-m54q
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