CVE-2026-48816

sigstore-js: Insufficient Verification of Data Authenticity

Published: Jul 14, 2026Updated: Jul 15, 2026 Sources: CVE List NVDCWE-345

6.5MEDIUM

Description

sigstore-js provides JavaScript libraries for interacting with Sigstore services. Prior to 3.1.1, @sigstore/verify derives a transparency-log timestamp from tlogEntries[].integratedTime for bundle v0.2 inclusionProof-only entries even though the inclusion proof path does not cryptographically bind integratedTime, allowing an attacker who can supply an untrusted bundle to influence certificate validity and timestampThreshold verification decisions. This issue is fixed in version 3.1.1.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:LPrivileges Required

Low

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:NConfidentiality

None

I:HIntegrity

High

A:NAvailability

None

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Weaknesses

CWE-345

Affected Products

sigstore

oss-projectaka rekor, cosign, gitsign

sigstore-jsOn-prem

Security Products / pki-crypto

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique

Collection

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References

https://github.com/sigstore/sigstore-js/security/advisories/GHSA-xgjw-pm74-86q4

github.com

https://github.com/sigstore/sigstore-js/pull/1659

github.com

https://github.com/sigstore/sigstore-js/commit/f074710a91ea9260a9ac2142345634579843a3cd

github.com

and 1 more references View all →

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