{"schemaVersion":3,"id":"CVE-2026-101914","aliases":["GHSA-88h9-xgvx-hvf2"],"status":"published","duplicateOf":null,"title":null,"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.","dates":{"published":"2026-09-28T19:36:55.746Z","modified":"2026-09-29T19:21:17.564Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":6.5,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":6.5,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Npm","score":6.5,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N","exploitability":5.6,"impact":7,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":6.5,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00251,"percentile":0.15487,"severity":"low","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[{"date":"2026-09-29T00:00:00.000Z","score":0.00251,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00251,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00251,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00251,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00251,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00251,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00251,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00251,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00251,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00251,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00251,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00251,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00251,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00251,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00251,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00251,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00251,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00251,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00251,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00251,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00251,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00251,"percentile":0.15487}],"last30":[{"date":"2026-09-29T00:00:00.000Z","score":0.00251,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00251,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00251,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00251,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00251,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00251,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00251,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00251,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00251,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00251,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00251,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00251,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00251,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00251,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00251,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00251,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00251,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00251,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00251,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00251,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00251,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00251,"percentile":0.15487}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-187","name":"Partial String Comparison","description":"The product performs a comparison that only examines a portion of a factor before determining whether there is a match, such as a substring, leading to resultant weaknesses.","type":"weakness","status":"Incomplete","abstraction":"Variant","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/187.html"},{"id":"CWE-863","name":"Incorrect Authorization","description":"The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.","type":"weakness","status":"Incomplete","abstraction":"Class","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/863.html"}],"affected":[{"vendor":"grpc","product":"grpc-node","name":"grpc-node","label":"grpc-node","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 1.13.1","noFixRecorded":false,"fixedIn":null},{"text":"≥ 1.14.0, < 1.14.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.13.1 | ≥ 1.14.0, < 1.14.1","eol":null,"hubHref":"/vendor/grpc/grpc-node"},{"vendor":"@grpc","product":"grpc-js-xds","name":"@grpc/grpc-js-xds","label":"grpc-js-xds","ecosystem":"Npm","cpePart":null,"purl":"pkg:npm/@grpc/grpc-js-xds","purlType":"npm","versions":[{"text":"< 1.13.1","noFixRecorded":false,"fixedIn":null},{"text":"≥ 1.14.0, < 1.14.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.13.1 | ≥ 1.14.0, < 1.14.1","eol":null,"hubHref":null}],"affectedCount":2,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/grpc/grpc-node/security/advisories/GHSA-88h9-xgvx-hvf2","label":"github.com/grpc/grpc-node/security/advisories/GHSA-88h9-xgvx-hvf2","hostname":"github.com","tags":["X Refsource CONFIRM","WEB"]},{"url":"https://github.com/grpc/grpc-node/commit/6cf64b596da03f1942a6b168998f0670217a99c4","label":"github.com/grpc/grpc-node/commit/6cf64b596da03f1942a6b168998f0670217a99c4","hostname":"github.com","tags":["X Refsource MISC","WEB"]},{"url":"https://github.com/grpc/grpc-node/commit/a6c5b31180cc8cea94d0a5ea215ce31a49e0409f","label":"github.com/grpc/grpc-node/commit/a6c5b31180cc8cea94d0a5ea215ce31a49e0409f","hostname":"github.com","tags":["X Refsource MISC","WEB"]},{"url":"https://github.com/grpc/grpc-node/commit/f32f3712e44581d8dfc8359bd8d30096662f4c75","label":"github.com/grpc/grpc-node/commit/f32f3712e44581d8dfc8359bd8d30096662f4c75","hostname":"github.com","tags":["X Refsource MISC","WEB"]},{"url":"https://github.com/grpc/grpc-node/releases/tag/@grpc/grpc-js-xds%401.13.1","label":"github.com/grpc/grpc-node/releases/tag/@grpc/grpc-js-xds%401.13.1","hostname":"github.com","tags":["X Refsource MISC","WEB"]},{"url":"https://github.com/grpc/grpc-node/releases/tag/@grpc/grpc-js-xds%401.14.1","label":"github.com/grpc/grpc-node/releases/tag/@grpc/grpc-js-xds%401.14.1","hostname":"github.com","tags":["X Refsource MISC","WEB"]},{"url":"https://github.com/grpc/grpc-node","label":"github.com/grpc/grpc-node","hostname":"github.com","tags":["PACKAGE"]},{"url":"https://github.com/grpc/grpc-node/releases/tag/@grpc/grpc-js-xds/1.13.1","label":"github.com/grpc/grpc-node/releases/tag/@grpc/grpc-js-xds/1.13.1","hostname":"github.com","tags":["WEB"]},{"url":"https://github.com/grpc/grpc-node/releases/tag/@grpc/grpc-js-xds/1.14.1","label":"github.com/grpc/grpc-node/releases/tag/@grpc/grpc-js-xds/1.14.1","hostname":"github.com","tags":["WEB"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-09-28T19:36:55.746Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-09-29T19:21:17.564Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":26,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T13:03:48.577Z","stale":false,"partial":false}}