{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-54787", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-06-15T23:23:57.714Z", "datePublished": "2026-07-31T21:58:14.156Z", "dateUpdated": "2026-07-31T21:58:14.156Z"}, "containers": {"cna": {"title": "sigstore-go fails to check signature timestamps against a signing key's validity period", "problemTypes": [{"descriptions": [{"cweId": "CWE-324", "lang": "en", "description": "CWE-324: Use of a Key Past its Expiration Date", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 3.1, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/sigstore/sigstore-go/security/advisories/GHSA-wqqc-jjcq-vfxm", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/sigstore/sigstore-go/security/advisories/GHSA-wqqc-jjcq-vfxm"}, {"name": "https://github.com/sigstore/sigstore-go/pull/642", "tags": ["x_refsource_MISC"], "url": "https://github.com/sigstore/sigstore-go/pull/642"}, {"name": "https://github.com/sigstore/sigstore-go/commit/4594ab4c779d08be1f4419803a8249188f35ed5f", "tags": ["x_refsource_MISC"], "url": "https://github.com/sigstore/sigstore-go/commit/4594ab4c779d08be1f4419803a8249188f35ed5f"}, {"name": "https://github.com/sigstore/sigstore-go/releases/tag/v1.2.1", "tags": ["x_refsource_MISC"], "url": "https://github.com/sigstore/sigstore-go/releases/tag/v1.2.1"}], "affected": [{"vendor": "sigstore", "product": "sigstore-go", "versions": [{"version": "< 1.2.1", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-07-31T21:58:14.156Z"}, "descriptions": [{"lang": "en", "value": "sigstore-go is a Go library for Sigstore signing and verification. Prior to 1.2.1, sigstore-go does not check a bundle signing timestamp against the validity window of an ExpiringKey wrapping a self-managed long-lived signing key without a certificate, which can allow an attacker holding expired key material to sign accepted bundles. This issue is fixed in version 1.2.1."}], "source": {"advisory": "GHSA-wqqc-jjcq-vfxm", "discovery": "UNKNOWN"}}}}

{}

{}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.2.1)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "sigstore-go", "source": "cna", "vendor": "sigstore"}, "product": "sigstore-go", "vendor": "sigstore"}], "created": "2026-07-31T23:30:17.101115+00:00", "updated": "2026-07-31T23:30:17.101160+00:00", "vendors": ["sigstore", "sigstore$PRODUCT$sigstore-go"]}