CVE-2026-48758

{"id": "CVE-2026-48758", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-48758", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-15T12:54:43.124124Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.4, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 2.5, "exploitabilityScore": 2.8}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "sigstore", "product": "sigstore-js", "versions": [{"status": "affected", "version": "< 3.2.1"}]}]}], "published": "2026-07-14T21:17:01.113", "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"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-347"}]}], "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."}], "lastModified": "2026-07-15T20:23:47.313", "sourceIdentifier": "security-advisories@github.com"}