{"id":"CVE-2026-48758","sourceIdentifier":"security-advisories@github.com","published":"2026-07-14T21:17:01.113","lastModified":"2026-10-24T21:10:00.130","vulnStatus":"Deferred","cveTags":[],"descriptions":[{"lang":"en","value":"sigstore-js provides JavaScript libraries for interacting with Sigstore services. Prior to 3.2.1, the preAuthEncoding function in @sigstore/core uses Node.js ascii encoding when converting the PAE string to bytes, allowing payloadType to be mutated after signing without invalidating the signature and breaking the type-binding guarantee that DSSE is designed to provide. This issue is fixed in version 3.2.1."},{"lang":"es","value":"sigstore-js proporciona bibliotecas JavaScript para interactuar con los servicios Sigstore. Antes de la 3.2.1, la función preAuthEncoding en @sigstore/core utiliza la codificación ascii de Node.js al convertir la cadena PAE a bytes, permitiendo que payloadType sea mutado después de la firma sin invalidar la firma y rompiendo la garantía de vinculación de tipo que DSSE está diseñado para proporcionar. Este problema está solucionado en la versión 3.2.1."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"sigstore","product":"sigstore-js","versions":[{"version":"< 3.2.1","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L","baseScore":5.4,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"LOW","availabilityImpact":"LOW"},"exploitabilityScore":2.8,"impactScore":2.5}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-07-15T12:54:43.124124Z","id":"CVE-2026-48758","options":[{"exploitation":"poc"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-347"}]}],"references":[{"url":"https://github.com/sigstore/sigstore-js/commit/b5aa4f1f8d2db0a9dfa6430fb114d9c2f1c304f7","source":"security-advisories@github.com"},{"url":"https://github.com/sigstore/sigstore-js/pull/1657","source":"security-advisories@github.com"},{"url":"https://github.com/sigstore/sigstore-js/releases/tag/%40sigstore%2Fcore%403.2.1","source":"security-advisories@github.com"},{"url":"https://github.com/sigstore/sigstore-js/security/advisories/GHSA-jfc7-64v2-mr8c","source":"security-advisories@github.com"},{"url":"https://github.com/sigstore/sigstore-js/security/advisories/GHSA-jfc7-64v2-mr8c","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}]}