{"id":"CVE-2026-4923","sourceIdentifier":"ce714d77-add3-4f53-aff5-83d477b104bb","published":"2026-03-26T19:17:08.187","lastModified":"2026-06-17T10:57:27.740","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"Impact:\n\nWhen using multiple wildcards, combined with at least one parameter, a regular expression can be generated that is vulnerable to ReDoS. This backtracking vulnerability requires the second wildcard to be somewhere other than the end of the path.\n\nUnsafe examples:\n\n/*foo-*bar-:baz\n/*a-:b-*c-:d\n/x/*a-:b/*c/y\n\nSafe examples:\n\n/*foo-:bar\n/*foo-:bar-*baz\n\nPatches:\n\nUpgrade to version 8.4.0.\n\nWorkarounds:\n\nIf you are using multiple wildcard parameters, you can check the regex output with a tool such as https://makenowjust-labs.github.io/recheck/playground/ to confirm whether a path is vulnerable."},{"lang":"es","value":"Impacto:\n\nAl usar múltiples comodines, combinados con al menos un parámetro, se puede generar una expresión regular que es vulnerable a ReDoS. Esta vulnerabilidad de retroceso requiere que el segundo comodín esté en un lugar distinto al final de la ruta.\n\nEjemplos no seguros:\n\n/*foo-*bar-:baz\n/*a-:b-*c-:d\n/x/*a-:b/*c/y\n\nEjemplos seguros:\n\n/*foo-:bar\n/*foo-:bar-*baz\n\nParches:\n\nActualice a la versión 8.4.0.\n\nSoluciones alternativas:\n\nSi está utilizando múltiples parámetros comodín, puede verificar la salida de la expresión regular con una herramienta como https://makenowjust-labs.github.io/recheck/playground/ para confirmar si una ruta es vulnerable."}],"affected":[{"source":"ce714d77-add3-4f53-aff5-83d477b104bb","affectedData":[{"vendor":"path-to-regexp","product":"path-to-regexp","defaultStatus":"unaffected","packageURL":"pkg:npm/path-to-regexp","versions":[{"version":"8.0.0","lessThan":"8.4.0","versionType":"semver","status":"affected"},{"version":"8.4.0","versionType":"semver","status":"unaffected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"ce714d77-add3-4f53-aff5-83d477b104bb","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":5.9,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":2.2,"impactScore":3.6}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-03-27T13:46:47.360477Z","id":"CVE-2026-4923","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"ce714d77-add3-4f53-aff5-83d477b104bb","type":"Secondary","description":[{"lang":"en","value":"CWE-1333"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:pillarjs:path-to-regexp:*:*:*:*:*:node.js:*:*","versionStartIncluding":"8.0.0","versionEndExcluding":"8.4.0","matchCriteriaId":"DB421812-F7E3-4CC5-B02B-53CCBFDFB671"}]}]}],"references":[{"url":"https://cna.openjsf.org/security-advisories.html","source":"ce714d77-add3-4f53-aff5-83d477b104bb","tags":["Third Party Advisory"]}]}