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.
{
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27838.json",
"cwe_ids": [
"CWE-639"
],
"cna_assigner": "GitHub_M"
}{
"source": [
"CPE_RANGE",
"REFERENCES"
],
"cpe": "cpe:2.3:a:wger:wger:*:*:*:*:*:*:*:*",
"extracted_events": [
{
"introduced": "0"
},
{
"last_affected": "2.4"
}
]
}