sigstore-js: Insufficient Verification of Data Authenticity

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Summary

CVECVE-2026-48816
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-14 21:17:01 UTC
Updated2026-07-14 21:17:01 UTC
Descriptionsigstore-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.

Risk And Classification

Primary CVSS: v3.1 6.5 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Problem Types: CWE-345 | CWE-345 CWE-345: Insufficient Verification of Data Authenticity

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
3.1CNADECLARED6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Sigstore Sigstore-js affected < 3.1.1 Not specified

References

ReferenceSourceLinkTags
github.com/sigstore/sigstore-js/pull/1659 [email protected] github.com
github.com/sigstore/sigstore-js/commit/f074710a91ea9260a9ac2142345634579... [email protected] github.com
github.com/sigstore/sigstore-js/releases/tag/%40sigstore%2Fverify%403.1.1 [email protected] github.com
github.com/sigstore/sigstore-js/security/advisories/GHSA-xgjw-pm74-86q4 [email protected] github.com
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