{"schema_version":"1.9.0","id":"CVE-2026-26205","published":"2026-02-19T19:31:26.905Z","modified":"2026-08-12T03:51:48.185584021Z","aliases":["GHSA-9f29-v6mm-pw6w","GO-2026-4506"],"related":["CGA-p67x-7q3f-c5cp","SUSE-SU-2026:0757-1","openSUSE-SU-2026:21483-1"],"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.","affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/open-policy-agent/opa-envoy-plugin","events":[{"introduced":"0"},{"fixed":"58c44d4ec408d5852d1d0287599e7d5c5e2bc5c3"},{"fixed":"0f0ab2d502dd44038fbae0fa1e6e0f1ff71558c6"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"1.13.2-envoy-2"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["v1.13.1-envoy","v1.13.0-envoy","v1.12.2-envoy","v1.12.1-envoy","v1.12.0-envoy","v1.11.1-envoy-3","v1.11.0-envoy","v1.10.0-envoy","v1.9.0-envoy","v1.8.0-envoy","v1.7.1-envoy","v1.6.0-envoy-2","v1.5.1-envoy","v1.5.0-envoy-4","v1.4.2-envoy","v1.3.0-envoy-1","v1.2.0-envoy-2","v1.1.0-envoy-1","v1.0.0-envoy","v0.70.0-envoy-1","v0.70.0-envoy","v0.69.0-envoy","v0.68.0-envoy-4","v0.68.0-envoy-3","v0.68.0-envoy-2","v0.68.0-envoy","v0.67.1-envoy","v0.67.0-envoy","v0.66.0-envoy-2","v0.66.0-envoy","v0.65.0-envoy","v0.64.1-envoy","v0.64.0-envoy","v0.63.0-envoy","v0.62.1-envoy-4","v0.62.1-envoy","v0.62.0-envoy","v0.61.0-envoy","v0.60.0-envoy","v0.59.0-envoy","v0.58.0-envoy","v0.57.1-envoy-3","v0.57.1-envoy","v0.57.0-envoy","v0.56.0-envoy-3","v0.56.0-envoy","v0.55.0-envoy","v0.54.0-envoy","v0.53.1-envoy","v0.53.0-envoy-1","v0.52.0-envoy","v0.51.0-envoy","v0.50.2-envoy","v0.50.1-envoy","v0.50.0-envoy-1","v0.49.2-envoy","v0.49.1-envoy","v0.49.0-envoy","v0.48.0-envoy","v0.47.4-envoy","v0.47.3-envoy","v0.47.2-envoy","v0.47.0-envoy","v0.46.1-envoy","v0.46.1","v0.45.0-envoy-10","proxy_init-v8","v0.45.0-envoy","v0.44.0-envoy","v0.43.0-envoy","v0.42.1-envoy","v0.42.0-envoy","v0.41.0-envoy","v0.40.0-envoy","proxy_init-v7","v0.39.0-envoy","v0.38.1-envoy-3","v0.38.0-envoy","v0.37.2-envoy","v0.37.1-envoy","v0.36.1-envoy","v0.36.0-envoy","v0.35.0-envoy-7","v0.35.0-envoy-1","v0.35.0-envoy","v0.34.2-envoy","v0.34.0-envoy","v0.33.1-envoy-3","v0.33.1-envoy-2","v0.32.1-envoy-1","v0.32.0-envoy-4","v0.31.0-envoy","v0.30.2-envoy-1","v0.30.1-envoy-5","v0.30.1-envoy","v0.29.4-envoy-3","v0.29.4-envoy-2","v0.29.1-envoy","v0.28.0-envoy","v0.27.1-envoy","v0.27.0-envoy-5","v0.27.0-envoy-4","v0.27.0-envoy","v0.26.0-envoy-6","v0.26.0-envoy-2","v0.26.0-envoy","v0.25.2-envoy-3","v0.25.2-envoy","v0.25.1-envoy","v0.25.0-envoy","v0.24.0-envoy-11","v0.24.0-envoy-8","0.24.0-envoy-8","v0.24.0-envoy-7","v0.24.0-envoy-5","v0.24.0-envoy-4","v0.24.0-envoy-3","v0.24.0-envoy-1","v0.24.0","v0.23.2","v0.23.1","v0.23.0","v0.22.0","v0.21.1","v0.21.0","v0.14.2","v0.13.2","v0.12.1","v0.12.0","v0.10.7","v0.10.6"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-26205.json"}}],"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"}],"database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-863"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/26xxx/CVE-2026-26205.json"},"severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H"}]}