{"id":"CVE-2026-65604","published":"2026-07-23T21:16:47Z","modified":"2026-10-08T15:23:56Z","title":"Skipper Incomplete Fix for CVE-2026-50197 Policy Bypass","vendor":"zalando","product":"skipper","tier":"tail","description":{"text":"Skipper contains an incomplete fix for CVE-2026-50197 in which oversized request bodies bypass Open Policy Agent (OPA) deny-on-presence Rego policies. When a request body exceeds the configured maxBodyBytes limit, Skipper forwards the full payload to the upstream service while OPA evaluates against an empty parsed_body, so policies that deny requests based on body content are not enforced and forbidden actions proceed. No fixed version is available; v0.27.26 adds documentation guidance only.","provenance":"source","from":"CVE.org"},"cvss":{"score":8.2,"severity":"HIGH","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N","provenance":"source","from":"CVE.org CNA"},"epss":{"score":0.0039,"percentile":0.33052,"provenance":"source"},"cwes":[{"id":"CWE-20","name":"Improper Input Validation"}],"references":[{"url":"https://github.com/zalando/skipper/security/advisories/GHSA-8qqm-fp2q-v734","tags":["vendor-advisory"]},{"url":"https://www.vulncheck.com/advisories/skipper-incomplete-fix-for-cve-2026-50197-policy-bypass","tags":["third-party-advisory"]}],"priority":{"score":12.4,"factors":[{"name":"EPSS percentile","points":6.61},{"name":"CVSS severity","points":5.74}]},"vendorSlug":"zalando","affectedVersions":[{"vendor":"zalando","product":"skipper","versions":["all versions"]}],"euvd":{"id":"EUVD-2026-48437","exploited":false,"provenance":"source"},"lineage":{"familyId":"fam-zalando-skipper-cve-2026-50197","parents":[{"from":"CVE-2026-50197","to":"CVE-2026-65604","relation":"incomplete-fix","confidence":"high","kind":"lineage","evidence":[{"kind":"text","provenance":"source","relation":"incomplete-fix","quote":"Skipper contains an incomplete fix for CVE-2026-50197 in which oversized request bodies bypass Open Policy Agent (OPA) deny-on-presence Rego policies.","from":"CVE.org","in":"CVE-2026-65604"}]}]}}