Back
CVE-2026-48816
sigstore-js: Insufficient Verification of Data Authenticity
Medium6.5EPSS 0.14%
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | Medium6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N |
| NVDNVD · Deferred | 3.1 | Medium6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N |
- EPSS (exploitation in 30 days)
- 0.14% · top 96% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: poc · Automatable: no · Technical impact: partial
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.5.
Weakness
Affected products
- affected < 3.1.1
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- npm@sigstore/verifyGHSA-xgjw-pm74-86q4 (opens in a new tab)
References (4)
- https://github.com/sigstore/sigstore-js/security/advisories/GHSA-xgjw-pm74-86q4 (opens in a new tab)x_refsource_CONFIRMexploit
- https://github.com/sigstore/sigstore-js/pull/1659 (opens in a new tab)x_refsource_MISC
- https://github.com/sigstore/sigstore-js/commit/f074710a91ea9260a9ac2142345634579843a3cd (opens in a new tab)x_refsource_MISC
- https://github.com/sigstore/sigstore-js/releases/tag/%40sigstore%2Fverify%403.1.1 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-xgjw-pm74-86q4 (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-48816)Record last updated .