Bug 2499688 (CVE-2026-48816) - CVE-2026-48816 sigstore-js: github.com/sigstore/sigstore-js: sigstore-js: Insufficient verification of data authenticity allows timestamp manipulation
Summary: CVE-2026-48816 sigstore-js: github.com/sigstore/sigstore-js: sigstore-js: Ins...
Keywords:
Status: NEW
Alias: CVE-2026-48816
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
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Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-13 14:40 UTC by OSIDB Bzimport
Modified: 2026-07-16 11:34 UTC (History)
29 users (show)

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Description OSIDB Bzimport 2026-07-13 14:40:18 UTC 
sigstore-js derives a transparency-log timestamp from tlogEntries[].integratedTime and uses it to validate certificate validity windows and satisfy timestampThreshold. For bundle v0.2, a tlog entry can be inclusionProof-only (no signed inclusionPromise/set), and the inclusion proof path does not cryptographically bind integratedTime. An attacker who can supply an untrusted bundle can influence time-based verification decisions by choosing integratedTime. Fixed in sigstore-js (see GHSA-xgjw-pm74-86q4).
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