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Security Advisories

CVE-2026-31812

NVD

https://nvd.nist.gov/vuln/detail/CVE-2026-31812

Severity

Unknown
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Summary

Quinn affected by unauthenticated remote DoS via panic in QUIC transport parameter parsing

Description

Quinn is a pure-Rust, async-compatible implementation of the IETF QUIC transport protocol. Prior to 0.11.14, a remote, unauthenticated attacker can trigger a denial of service in applications using vulnerable quinn versions by sending a crafted QUIC Initial packet containing malformed quic_transport_parameters. In quinn-proto parsing logic, attacker-controlled varints are decoded with unwrap(), so truncated encodings cause Err(UnexpectedEnd) and panic. This is reachable over the network with a single packet and no prior trust or authentication. This vulnerability is fixed in 0.11.14.

Affected packages


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