UBUNTU-CVE-2026-49835

Sigstore Timestamp Authority is a service for issuing RFC 3161 timesta...

CVE-2026-49835 Sigstore Timestamp Authority: OOM due to unbounded metric label cardinality

Sigstore Timestamp Authority is a service for issuing RFC 3161 timestamps. Prior to 2.1.0, the global wrapMetrics middleware records raw HTTP request path r.URL.Path and raw HTTP request method r.Method as Prometheus labels for latency and request count metric vectors before routing, allowing an...

UBUNTU-CVE-2025-66564

Sigstore Timestamp Authority is a service for issuing RFC 3161 timestamps. Prior to 2.0.3, Function api.ParseJSONRequest currently splits via a call to strings.Split an optionally-provided OID which is untrusted data on periods. Similarly, function api.getContentType splits the Content-Type heade...

CVE-2025-52556

CVE-2025-52556 affects the Python library rfc3161-client. Prior to version 1.0.3, the timestamp response signature verification flaw arises because chain verification checks the TSR’s embedded certificates up to trusted roots but does not verify the TSR’s own signature against the timestamping le...

GHSA-CQ38-JH5F-37MQ sigstore-go has an unbounded loop over untrusted input can lead to endless data attack

Impact sigstore-go is susceptible to a denial of service attack when a verifier is provided a maliciously crafted Sigstore Bundle containing large amounts of verifiable data, in the form of signed transparency log entries, RFC 3161 timestamps, and attestation subjects. The verification of these...