{"id":"CVE-2026-26205","aliases":["GHSA-9f29-v6mm-pw6w","GO-2026-4506"],"url":"https://o3.security/vulnerability/CVE-2026-26205","summary":"opa-envoy-plugin has an Authorization Bypass via Double-Slash Path Misinterpretation in `input.parsed_path`","details":"opa-envoy-plugun is a plugin to enforce OPA policies with Envoy. Versions prior to 1.13.2-envoy-2 have a vulnerability in how the `input.parsed_path` field is constructed. HTTP request paths are treated as full URIs when parsed; interpreting leading path segments prefixed with double slashes (`//`) as authority components, and therefore dropping them from the parsed path. This creates a path interpretation mismatch between authorization policies and backend servers, enabling attackers to bypass access controls by crafting requests where the authorization filter evaluates a different path than the one ultimately served. Version 1.13.2-envoy-2 fixes the issue.","published":"2026-02-19T19:31:26.905Z","modified":"2026-08-07T11:50:15.970914516Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/open-policy-agent/opa-envoy-plugin","fixedVersion":"1.13.2-envoy-2"}],"fix":{"url":"https://github.com/open-policy-agent/opa-envoy-plugin/commit/58c44d4ec408d5852d1d0287599e7d5c5e2bc5c3","label":"open-policy-agent/opa-envoy-plugin@58c44d4"},"references":[{"type":"WEB","url":"https://github.com/open-policy-agent/opa-envoy-plugin/releases/tag/v1.13.2-envoy-2"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/26xxx/CVE-2026-26205.json"},{"type":"ADVISORY","url":"https://github.com/open-policy-agent/opa-envoy-plugin/security/advisories/GHSA-9f29-v6mm-pw6w"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-26205"},{"type":"FIX","url":"https://github.com/open-policy-agent/opa-envoy-plugin/commit/58c44d4ec408d5852d1d0287599e7d5c5e2bc5c3"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T11:50:15.970914516Z"}}