CVE-2026-48816

MEDIUM

sigstore-js: Insufficient Verification of Data Authenticity

Title source: cna

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.

References (4)

Core 4

Core References

X_Refsource_Confirm x_refsource_confirm

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

X_Refsource_Misc x_refsource_misc

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

X_Refsource_Misc x_refsource_misc

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

View Writeup ZIP pw:eip

X_Refsource_Misc x_refsource_misc

https://github.com/sigstore/sigstore-js/releases/tag/%40sigstore%2Fverify%403.1.1

Scores

CVSS v3 6.5

EPSS 0.0012

EPSS Percentile 2.5%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation poc

Automatable no

Technical Impact partial

Details

CWE

CWE-345

Status published

Products (1)

sigstore/sigstore-js < 3.1.1

Published Jul 14, 2026

Tracked Since Jul 15, 2026