{"id":"CVE-2026-50197","published":"2026-07-17T19:23:43Z","modified":"2026-07-20T14:33:29Z","title":"Skipper: opaAuthorizeRequestWithBody filter bypasses OPA policy on Transfer-Encoding: chunked / HTTP/2 requests","vendor":"zalando","product":"skipper","tier":"tail","description":{"text":"Skipper is an HTTP router and reverse proxy for service composition. Prior to 0.26.10, zalando/skipper's OpenPolicyAgent integration silently bypasses request-body inspection on HTTP/1.1 Transfer-Encoding: chunked and HTTP/2 requests that omit the content-length pseudo-header, because the opaAuthorizeRequestWithBody filter and OpenPolicyAgentInstance.ExtractHttpBodyOptionally in filters/openpolicyagent/openpolicyagent.go produce an empty raw_body and input.parsed_body while the upstream service receives the full attacker-controlled body. This issue is fixed in version 0.26.10.","provenance":"source","from":"CVE.org"},"cvss":{"score":7.8,"severity":"HIGH","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N","provenance":"source","from":"CVE.org CNA"},"epss":{"score":0.00513,"percentile":0.43609,"provenance":"source"},"cwes":[{"id":"CWE-444","name":"Inconsistent Interpretation of HTTP Requests"}],"references":[{"url":"https://github.com/zalando/skipper/security/advisories/GHSA-659f-rgp5-w4wf","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/zalando/skipper/pull/4041","tags":["x_refsource_MISC"]},{"url":"https://github.com/zalando/skipper/commit/3152f3b0bb52ca89c3564be42434db0a2a1cea23","tags":["x_refsource_MISC"]},{"url":"https://github.com/zalando/skipper/releases/tag/v0.26.10","tags":["x_refsource_MISC"]}],"priority":{"score":14.2,"factors":[{"name":"EPSS percentile","points":8.72},{"name":"CVSS severity","points":5.46}]},"vendorSlug":"zalando","affectedVersions":[{"vendor":"zalando","product":"skipper","versions":["< 0.26.10"]}],"affected":[{"ecosystem":"Go","package":"github.com/zalando/skipper","vulnerableRanges":["<0.26.10"],"patched":["0.26.10"],"from":["GHSA-659f-rgp5-w4wf","GO-2026-5944"],"provenance":"source"}],"euvd":{"id":"EUVD-2026-45289","exploited":false,"provenance":"source"},"lineage":{"familyId":"fam-zalando-skipper-cve-2026-50197","children":[{"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"}]},{"from":"CVE-2026-50197","to":"CVE-2026-65838","relation":"incomplete-fix","confidence":"high","kind":"lineage","evidence":[{"kind":"text","provenance":"source","relation":"incomplete-fix","quote":"This incomplete remediation of CVE-2026-50197 affects deployments that authorize request-body content and exceed -open-policy-agent-max-request-body-size, which defaults to 1 MB.","from":"CVE.org","in":"CVE-2026-65838"}]}],"packageHistory":[{"cve":"CVE-2022-38580","published":"2022-10-24","fixed":"0.13.237","kev":false},{"cve":"CVE-2026-23742","published":"2026-01-16","fixed":"0.23.0","kev":false},{"cve":"CVE-2026-24470","published":"2026-01-26","fixed":"0.24.0","kev":false},{"cve":"CVE-2026-50197","published":"2026-07-17","fixed":"0.26.10","kev":false},{"cve":"CVE-2026-54247","published":"2026-09-14","fixed":"0.26.22","kev":false,"link":{"from":"CVE-2026-50197","to":"CVE-2026-54247","relation":"successor","confidence":"low","kind":"sequence","evidence":[{"kind":"version-step","provenance":"source","package":"Go:github.com/zalando/skipper","fromFixed":"0.26.10","toFixed":"0.26.22","daysApart":59}]}},{"cve":"CVE-2026-54246","published":"2026-09-14","fixed":"0.27.13","kev":false},{"cve":"CVE-2026-65838","published":"2026-09-14","fixed":"0.27.26","kev":false}],"package":"Go:github.com/zalando/skipper"}}