CVE-2026-44433 Quicly is vulnerable to memory exhaustion

Quicly is an IETF QUIC protocol implementation intended primarily for use within the H2O HTTP server. Prior to commit 8b178e6, an adversarial peer could send a STREAM frame carrying just one byte at the largest offset being permitted to obtain additional flow control credit, which under certain...

PT-2026-60592

Name of the Vulnerable Software and Affected Versions Quicly versions prior to commit 8b178e6 Description An adversarial peer can send a STREAM frame containing a single byte at the maximum permitted offset to obtain additional flow control credit. This behavior can lead to a Denial of Service if...