{"id":"CVE-2026-101914","state":"PUBLISHED","title":"@grpc/grpc-js: The exact path match matcher incorrectly only applies a prefix match for case-insensitive matches","description":"@grpc/grpc-js implements the core functionality of gRPC purely in JavaScript, without a C++ addon. Prior to 1.13.1 and 1.14.1, the exact path (method name) matcher used by RBAC performs a prefix comparison instead of an equality comparison when case-insensitive matching is enabled. If one service method name prefixes another and the methods have different access rules, a request for the longer method can match the shorter method's rule and cause incorrect authorization. This issue is fixed in versions 1.13.1 and 1.14.1.","publishedAt":"2026-09-28T19:36:55.746Z","updatedAt":"2026-09-29T19:21:17.564Z","severity":{"score":6.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["grpc grpc-node"],"affected":[{"vendor":"grpc","product":"grpc-node","versions":[{"version":"< 1.13.1","status":"affected"},{"version":">= 1.14.0, < 1.14.1","status":"affected"}]}],"references":["https://github.com/grpc/grpc-node/security/advisories/GHSA-88h9-xgvx-hvf2","https://github.com/grpc/grpc-node/commit/6cf64b596da03f1942a6b168998f0670217a99c4","https://github.com/grpc/grpc-node/commit/a6c5b31180cc8cea94d0a5ea215ce31a49e0409f","https://github.com/grpc/grpc-node/commit/f32f3712e44581d8dfc8359bd8d30096662f4c75","https://github.com/grpc/grpc-node/releases/tag/@grpc/grpc-js-xds%401.13.1","https://github.com/grpc/grpc-node/releases/tag/@grpc/grpc-js-xds%401.14.1"],"weaknesses":["CWE-187","CWE-863"],"ingestedAt":"2026-10-29T20:10:13.529Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/101xxx/CVE-2026-101914.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-101914","state":"PUBLISHED","datePublished":"2026-09-28T19:36:55.746Z","dateUpdated":"2026-09-29T19:21:17.564Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-09-28T15:55:37.907Z"},"containers":{"cna":{"title":"@grpc/grpc-js: The exact path match matcher incorrectly only applies a prefix match for case-insensitive matches","descriptions":[{"lang":"en","value":"@grpc/grpc-js implements the core functionality of gRPC purely in JavaScript, without a C++ addon. Prior to 1.13.1 and 1.14.1, the exact path (method name) matcher used by RBAC performs a prefix comparison instead of an equality comparison when case-insensitive matching is enabled. If one service method name prefixes another and the methods have different access rules, a request for the longer method can match the shorter method's rule and cause incorrect authorization. This issue is fixed in versions 1.13.1 and 1.14.1."}],"affected":[{"vendor":"grpc","product":"grpc-node","versions":[{"version":"< 1.13.1","status":"affected"},{"version":">= 1.14.0, < 1.14.1","status":"affected"}]}],"references":[{"url":"https://github.com/grpc/grpc-node/security/advisories/GHSA-88h9-xgvx-hvf2","name":"https://github.com/grpc/grpc-node/security/advisories/GHSA-88h9-xgvx-hvf2","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/grpc/grpc-node/commit/6cf64b596da03f1942a6b168998f0670217a99c4","name":"https://github.com/grpc/grpc-node/commit/6cf64b596da03f1942a6b168998f0670217a99c4","tags":["x_refsource_MISC"]},{"url":"https://github.com/grpc/grpc-node/commit/a6c5b31180cc8cea94d0a5ea215ce31a49e0409f","name":"https://github.com/grpc/grpc-node/commit/a6c5b31180cc8cea94d0a5ea215ce31a49e0409f","tags":["x_refsource_MISC"]},{"url":"https://github.com/grpc/grpc-node/commit/f32f3712e44581d8dfc8359bd8d30096662f4c75","name":"https://github.com/grpc/grpc-node/commit/f32f3712e44581d8dfc8359bd8d30096662f4c75","tags":["x_refsource_MISC"]},{"url":"https://github.com/grpc/grpc-node/releases/tag/@grpc/grpc-js-xds%401.13.1","name":"https://github.com/grpc/grpc-node/releases/tag/@grpc/grpc-js-xds%401.13.1","tags":["x_refsource_MISC"]},{"url":"https://github.com/grpc/grpc-node/releases/tag/@grpc/grpc-js-xds%401.14.1","name":"https://github.com/grpc/grpc-node/releases/tag/@grpc/grpc-js-xds%401.14.1","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-187","lang":"en","description":"CWE-187: Partial String Comparison","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-863","lang":"en","description":"CWE-863: Incorrect Authorization","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-09-28T19:46:53.330Z"},"source":{"advisory":"GHSA-88h9-xgvx-hvf2","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-29T19:21:06.531070Z","id":"CVE-2026-101914","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-29T19:21:17.564Z"}}]}}}