CVE-2026-48816: Insufficient Verification of Data Authenticity in sigstore-js

Insufficient Verification of Data Authenticity in sigstore-js

F-SIG-JS-TLOGTIME-001

Public snapshot: 26 Sep 2026. Status, releases and attribution belong to each source below; none is inferred from another record.

Recorded evidence

6.5medium

CVE-2026-48816CVEsigstore/sigstore-js

Insufficient Verification of Data Authenticity in sigstore-js

Fixed in: @sigstore/verify 3.1.1

patched

details

Finding IDs: F-SIG-JS-TLOGTIME-001
CVE: CVE-2026-48816
GHSA: GHSA-xgjw-pm74-86q4
Status: patched
CWE: CWE-345
Fixed in: @sigstore/verify 3.1.1
Recorded credit: reporter: @1seal
Note: GHSA-xgjw-pm74-86q4; inclusionProof-only bundle integratedTime was treated as a trusted timestamp without cryptographic binding.
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
CVE registry state: PUBLISHED
CVE state checked: 23 Sep 2026
Upstream title: Insufficient Verification of Data Authenticity in sigstore-js
Upstream CWE: CWE-345
Upstream publication: 27 May 2026
Upstream updated: 27 May 2026
Metadata fetched: 23 Sep 2026
Upstream @1seal credit: @1seal: reporter (accepted)

F-SIG-JS-TLOGTIME-001: Verification failures. An unsigned integratedTime influences certificate-time validation. Reviewed 24 Sep 2026. Mechanism assessed by 1seal.

Mechanism source for F-SIG-JS-TLOGTIME-001

Security area (1seal assessment): Integrity. An unauthenticated integratedTime is used as trusted time evidence; the affected property is integrity of the timestamp used for verification. Reviewed 24 Sep 2026.

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