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Version 1.13.2-envoy-2 fixes the issue.","state":0,"publishedAt":"2026-02-19T19:31:26.905+00:00","modifiedAt":"2026-02-19T21:22:21.384+00:00","affected":[{"ecosystem":"Vendor product","name":"opa-envoy-plugin","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"open-policy-agent\",\n                    \"product\": \"opa-envoy-plugin\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 1.13.2-envoy-2\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"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","score":7.1,"severity":"HIGH"}],"references":["https://github.com/open-policy-agent/opa-envoy-plugin/security/advisories/GHSA-9f29-v6mm-pw6w","https://github.com/open-policy-agent/opa-envoy-plugin/commit/58c44d4ec408d5852d1d0287599e7d5c5e2bc5c3","https://github.com/open-policy-agent/opa-envoy-plugin/releases/tag/v1.13.2-envoy-2"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-26205","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-26205","identifiers":["CVE-2026-26205"]},"retained":false,"historicalAffected":[]},{"revision":"ff20aa827d55459c90afc2e1f424a043","observedAt":"2026-11-13T08:13:42.906+00:00","statement":{"source":"euvd","id":"EUVD-2026-7976","aliases":["CVE-2026-26205","GHSA-9f29-v6mm-pw6w"],"title":"opa-envoy-plugun is a plugin to enforce OPA policies with Envoy. 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Version 1.13.2-envoy-2 fixes the issue.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 4.0","vector":"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","score":7.1,"severity":null}],"references":["https://github.com/open-policy-agent/opa-envoy-plugin/security/advisories/GHSA-9f29-v6mm-pw6w","https://github.com/open-policy-agent/opa-envoy-plugin/commit/58c44d4ec408d5852d1d0287599e7d5c5e2bc5c3","https://github.com/open-policy-agent/opa-envoy-plugin/releases/tag/v1.13.2-envoy-2"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-7976","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Feb 19, 2026, 7:31:26 PM","dateUpdated":"Feb 19, 2026, 9:22:21 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. 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Version 1.13.2-envoy-2 fixes the issue.","state":0,"publishedAt":"2026-02-19T20:25:43.263+00:00","modifiedAt":"2026-06-17T10:25:56.37+00:00","affected":[],"metrics":[{"system":"CVSS 4.0 · security-advisories@github.com · Secondary","vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","score":7.1,"severity":"HIGH"}],"references":["https://github.com/open-policy-agent/opa-envoy-plugin/commit/58c44d4ec408d5852d1d0287599e7d5c5e2bc5c3","https://github.com/open-policy-agent/opa-envoy-plugin/releases/tag/v1.13.2-envoy-2","https://github.com/open-policy-agent/opa-envoy-plugin/security/advisories/GHSA-9f29-v6mm-pw6w"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-26205","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Deferred","weaknesses":["CWE-863"],"productCriteria":[],"sourceDates":{"published":"2026-02-19T20:25:43.263","lastModified":"2026-06-17T10:25:56.370"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-26205","identifiers":["CVE-2026-26205"]},"retained":false,"historicalAffected":[]},{"revision":"31d3707246294a0b83ab7baae6ff57eb","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GHSA-9f29-v6mm-pw6w","aliases":["CVE-2026-26205","GO-2026-4506"],"title":"opa-envoy-plugin has an Authorization Bypass via Double-Slash Path Misinterpretation in input.parsed_path","description":"A security vulnerability has been discovered 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](https://datatracker.ietf.org/doc/html/rfc3986#section-3.2) 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.\n\n#### Attack example\n\n**HTTP request:**\n\n```\nGET //admin/users HTTP/1.1\nHost: example.com\n```\n\n**Policy sees:**\n\nThe leading `//admin` path segment is interpreted as an authority component, and dropped from `input.parsed_path` field:\n\n\n```json\n{\n  \"parsed_path\": [\"users\"]\n}\n```\n\n**Backend receives:**\n\n`//admin/users` path, normalized to `/admin/users`.\n\n#### Affected Request Pattern Examples\n\n| Request path | `input.parsed_path` | `input.attributes.request.http.path` | Discrepancy |\n| - | - | - | - |\n| / | [\"\"] | / | ✅ None |\n| //foo  | [\"\"] | //foo| ❌ Mismatch |\n| /admin | [\"admin\"] | /admin | ✅ None |\n| /admin/users | [\"admin\", \"users\"] |  /admin/users | ✅ None |\n| //admin/users  | [\"users\"] | //admin/users | ❌ Mismatch |\n\n### Impact\n\nUsers are impacted if all the following conditions apply:\n\n1. Protected resources are path-hierarchical (e.g., `/admin/users` vs `/users`)\n2. Authorization policies use `input.parsed_path` for path-based decisions\n3. Backend servers apply lenient path normalization\n\n### Patches\n\nGo: `v1.13.2-envoy-2`\nDocker: `1.13.2-envoy-2`, `1.13.2-envoy-2-static`\n\n### Workarounds\n\nUsers who cannot immediately upgrade opa-envoy-plugin are recommended to apply one, or more, of the workarrounds described below.\n\n#### 1. Enable the `merge_slashes` Envoy configuration option\n\nAs per [Envoy best practices](https://www.envoyproxy.io/docs/envoy/v1.37.0/configuration/best_practices/edge.html), enabling the [merge_slashes](https://www.envoyproxy.io/docs/envoy/latest/api-v3/extensions/filters/network/http_connection_manager/v3/http_connection_manager.proto#envoy-v3-api-field-extensions-filters-network-http-connection-manager-v3-httpconnectionmanager-merge-slashes) configuration option in Envoy will remove redundant slashes from the request path before filtering is applied, effectively mitigating the `input.parsed_path` issue described in this advisory.\n\n\n#### 2. Use `input.attributes.request.http.path` instead of `input.parsed_path` in policies\n\nThe `input.attributes.request.http.path` field contains the unprocessed, raw request path. Users are recommended to update any policy using `input.parsed_path` to instead use the `input.attributes.request.http.path` field.\n\n##### Example ####\n\n```rego\npackage example\n\n# Use instead of input.parsed_path\nparsed_path := split(                                        # tokenize into array\n\ttrim_left(                                               # drop leading slashes\n\t\turlquery.decode(input.attributes.request.http.path), # url-decode the path\n\t\t\"/\",\n\t),\n\t\"/\",\n)\n```","state":0,"publishedAt":"2026-02-18T15:25:04+00:00","modifiedAt":"2026-09-10T03:50:34.6215917+00:00","affected":[{"ecosystem":"Go","name":"github.com/open-policy-agent/opa-envoy-plugin","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"1.13.2-envoy-2"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V4","vector":"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","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"HIGH"}],"references":["https://github.com/open-policy-agent/opa-envoy-plugin/security/advisories/GHSA-9f29-v6mm-pw6w","https://nvd.nist.gov/vuln/detail/CVE-2026-26205","https://github.com/open-policy-agent/opa-envoy-plugin/commit/58c44d4ec408d5852d1d0287599e7d5c5e2bc5c3","https://github.com/open-policy-agent/opa-envoy-plugin","https://github.com/open-policy-agent/opa-envoy-plugin/releases/tag/v1.13.2-envoy-2"],"sourceUrl":"https://github.com/advisories/GHSA-9f29-v6mm-pw6w","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-9f29-v6mm-pw6w","identifiers":["GHSA-9f29-v6mm-pw6w","CVE-2026-26205","GO-2026-4506"]},"retained":false,"historicalAffected":[]},{"revision":"c0acbdb16bca40788c7df5b1400271b0","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GO-2026-4506","aliases":["CVE-2026-26205","GHSA-9f29-v6mm-pw6w"],"title":"opa-envoy-plugin has an Authorization Bypass via Double-Slash Path Misinterpretation in input.parsed_path in github.com/open-policy-agent/opa-envoy-plugin","description":"opa-envoy-plugin has an Authorization Bypass via Double-Slash Path Misinterpretation in input.parsed_path in github.com/open-policy-agent/opa-envoy-plugin","state":0,"publishedAt":"2026-02-23T18:23:12+00:00","modifiedAt":"2026-02-24T22:14:03.198652+00:00","affected":[{"ecosystem":"Go","name":"github.com/open-policy-agent/opa-envoy-plugin","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"1.13.2-envoy-2"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[],"references":["https://github.com/open-policy-agent/opa-envoy-plugin/security/advisories/GHSA-9f29-v6mm-pw6w","https://nvd.nist.gov/vuln/detail/CVE-2026-26205","https://github.com/open-policy-agent/opa-envoy-plugin/commit/58c44d4ec408d5852d1d0287599e7d5c5e2bc5c3","https://github.com/open-policy-agent/opa-envoy-plugin/releases/tag/v1.13.2-envoy-2"],"sourceUrl":"https://osv.dev/vulnerability/GO-2026-4506","license":"OSV · upstream source license applies","key":"osv:GO-2026-4506","identifiers":["GO-2026-4506","CVE-2026-26205","GHSA-9f29-v6mm-pw6w"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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