VULNERABILITY INTELLIGENCE
CVE-2026-31812
CVSS score5.3 MEDIUM
EPSS probability0.52%
CISA KEVNot currently listed
Published2026-03-10
Last modified2026-08-25
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
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.
Weakness classification
- security-advisories@github.com: CWE-248
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c: CWE-248