CVE WatchAug 1, 2026

CVE-2026-54787

sigstore-go is a Go library for Sigstore signing and verification. Prior to 1.2.1, sigstore-go does not check a bundle signing timestamp aga

CVSS

3.1

Low

EPSS

0.1%

KEV

—

Exploit Today

0-100

Published: Jul 31, 2026 · Last modified: Aug 1, 2026 · CWE-324

EPSS · 30d

0.1%EPSS · 30 days0.1%

2026-08-012026-08-04

Technical description

sigstore-go is a Go library for Sigstore signing and verification. Prior to 1.2.1, sigstore-go does not check a bundle signing timestamp against the validity window of an ExpiringKey wrapping a self-managed long-lived signing key without a certificate, which can allow an attacker holding expired key material to sign accepted bundles. This issue is fixed in version 1.2.1.

Official references

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CVE-2026-399238.1 HIG

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———Flarum before 1.8.16 contains a password reset token expiry bypass vulnerability that allows unauthenticated attackers to reuse expired password reset tokens by submitting them directly to the reset processing endpoint. The SavePasswordController::handle() method calls PasswordToken::findOrFail() without performing any expiry validation, allowing attackers to bypass the 24-hour token lifetime enforced only during form rendering and change any account's password to gain an authenticated session.8h