{"id":"CVE-2026-50197","state":"PUBLISHED","title":"Skipper: opaAuthorizeRequestWithBody filter bypasses OPA policy on Transfer-Encoding: chunked / HTTP/2 requests","description":"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.","publishedAt":"2026-07-17T19:23:43.574Z","updatedAt":"2026-07-20T14:33:29.442Z","severity":{"score":7.8,"label":"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","source":"GitHub_M"},"assigner":"GitHub_M","products":["zalando skipper"],"affected":[{"vendor":"zalando","product":"skipper","versions":[{"version":"< 0.26.10","status":"affected"}]}],"references":["https://github.com/zalando/skipper/security/advisories/GHSA-659f-rgp5-w4wf","https://github.com/zalando/skipper/pull/4041","https://github.com/zalando/skipper/commit/3152f3b0bb52ca89c3564be42434db0a2a1cea23","https://github.com/zalando/skipper/releases/tag/v0.26.10"],"weaknesses":["CWE-444"],"ingestedAt":"2026-10-29T20:12:16.098Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/50xxx/CVE-2026-50197.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-50197","state":"PUBLISHED","datePublished":"2026-07-17T19:23:43.574Z","dateUpdated":"2026-07-20T14:33:29.442Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-03T22:05:13.645Z"},"containers":{"cna":{"title":"Skipper: opaAuthorizeRequestWithBody filter bypasses OPA policy on Transfer-Encoding: chunked / HTTP/2 requests","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"zalando","product":"skipper","versions":[{"version":"< 0.26.10","status":"affected"}]}],"references":[{"url":"https://github.com/zalando/skipper/security/advisories/GHSA-659f-rgp5-w4wf","name":"https://github.com/zalando/skipper/security/advisories/GHSA-659f-rgp5-w4wf","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/zalando/skipper/pull/4041","name":"https://github.com/zalando/skipper/pull/4041","tags":["x_refsource_MISC"]},{"url":"https://github.com/zalando/skipper/commit/3152f3b0bb52ca89c3564be42434db0a2a1cea23","name":"https://github.com/zalando/skipper/commit/3152f3b0bb52ca89c3564be42434db0a2a1cea23","tags":["x_refsource_MISC"]},{"url":"https://github.com/zalando/skipper/releases/tag/v0.26.10","name":"https://github.com/zalando/skipper/releases/tag/v0.26.10","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","subAvailabilityImpact":"NONE","baseScore":7.8,"baseSeverity":"HIGH","vectorString":"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","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-444","lang":"en","description":"CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-07-17T19:23:43.574Z"},"source":{"advisory":"GHSA-659f-rgp5-w4wf","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/zalando/skipper/security/advisories/GHSA-659f-rgp5-w4wf","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-20T14:33:19.738683Z","id":"CVE-2026-50197","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-20T14:33:29.442Z"}}]}}}