Medium [CVE-2026-48816] Insufficient verification of data authenticity allows timestamp manipulation
This medium-severity Red Hat Linux advisory covers CVE-2026-48816 affecting Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9.
Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.
VulniPulse record published Record updated
Summary
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. A flaw was found in sigstore-js.
This could lead to incorrect validation of certificate validity. Red Hat severity: Moderate — CVSS 6.5 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N).
Weakness: CWE-345. Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat OpenShift Dev Spaces; Red Hat Satellite 6; Self-service automation portal 2.
Red Hat does not currently list a fixing RHSA for this CVE.
Affected products named by the advisory: Red Hat package: sigstore.
Is CVE-2026-48816 exploited?
No exploitation is reported in the sources VulniPulse tracks: CVE-2026-48816 is not in the CISA KEV catalog (checked ) and this advisory does not report exploitation. That is not proof the vulnerability cannot be exploited.
How do I fix CVE-2026-48816?
Upgrade to a fixed release named by Red Hat:
- 3.1.1
Confirm against the vendor advisory before you patch.
- < 3.1.1
Official advisory · high-confidence parse· fetched 11 days ago·verify at source
Mitigation checklist
- Upgrade to the latest sigstore-js (>= 3.1.1) release that addresses GHSA-xgjw-pm74-86q4.
Official advisory · high-confidence parse· fetched 11 days ago·verify at source
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