CVE-2026-31812
Quinn affected by unauthenticated remote DoS via panic in QUIC transport parameter parsing
CVSS Score
5.3
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-248 |
| Vendor | quinn-rs |
| Product | quinn |
| Published | Mar 10, 2026 |
| Last Updated | Jul 15, 2026 |
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Affected Versions
quinn-rs / quinn
< 0.11.14
References
github.com: https://github.com/quinn-rs/quinn/security/advisories/GHSA-6xvm-j4wr-6v98 access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-31812 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2446330 security.access.redhat.com: https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-31812.json access.redhat.com: https://access.redhat.com/errata/RHSA-2026:22862 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:13545 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:19712 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:5459