CVE-2026-44434

Quicly (QUIC protocol implementation used with H2O HTTP server) was vulnerable to stateless reset injection before commit dccf5d4 due to lack of packet entry validation, allowing an on-path attacker to reset QUIC connections by exploiting zero-initialized secret-pattern slots. The issue has been ...

CVE-2026-44434 Quicly is vulnerable to stateless reset injection

Quicly is an IETF QUIC protocol implementation intended primarily for use within the H2O HTTP server. Prior to commit dccf5d4, Quicly was vulnerable to stateless reset injection through lack of packet entry validation. The QUIC protocol is designed to withstand packet injection attacks, once the...

PT-2026-60600

Name of the Vulnerable Software and Affected Versions Quicly versions prior to commit dccf5d4 Description Quicly, an IETF QUIC protocol implementation used in the H2O HTTP server, is susceptible to stateless reset injection. The issue stems from a lack of packet entry validation when handling...