CVE-2026-48816sigstore-js: Insufficient Verification of Data Authenticity
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 6.5 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
- Weakness (CWE)
- CWE-345
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Deferred
- Record last updated
- Jul 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
sigstore sigstore-js sigstore:js (from the name) | before 3.1.1 | CNA record |
References
- https://github.com/sigstore/sigstore-js/security/advisories/GHSA-xgjw-pm74-86q4x-refsource-confirm
- https://github.com/sigstore/sigstore-js/pull/1659x-refsource-misc
- https://github.com/sigstore/sigstore-js/commit/f074710a91ea9260a9ac2142345634579843a3cdx-refsource-misc
- https://github.com/sigstore/sigstore-js/releases/tag/%40sigstore%2Fverify%403.1.1x-refsource-misc
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.