Vulnerability HighRUSTSEC-2026-0037 · quinn-proto
RUSTSEC-2026-0037: Denial of service in Quinn endpoints
Short answerA security vulnerability in the quinn-proto crate: Denial of service in Quinn endpoints. GitHub rates it High. Fixed in 0.11.14: update to a fixed version.
| Crate | quinn-proto |
|---|---|
| Type | Vulnerability (denial-of-service) |
| Affected versions | From 0.5.0 before 0.11.14. |
| Fixed in | 0.11.14 |
| Severity | High (GitHub rating) CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N |
| Published | 2026-03-09 |
| Last changed | 2026-03-14 |
| Also known as | CVE-2026-31812, GHSA-6xvm-j4wr-6v98 |
What to do
- See which version you have:
cargo tree -i quinn-proto(it also shows which of your dependencies pulls it in). - Update within your version requirement:
cargo update -p quinn-proto. If the fix is a newer major or minor than your requirement allows, raise it in Cargo.toml (for examplequinn-proto = "0.11.14") or update the dependency that pulls it in. - Check again with
cargo audit, or paste your Cargo.lock into our Cargo.toml checker.
Details from the advisory
Receiving QUIC transport parameters containing invalid values could lead to a panic.
Unfortunately the maintainers did not properly assess usage of unwrap() calls in the transport parameters parsing code, and we did not have sufficient fuzzing coverage to find this issue. We have since added a fuzzing target to cover this code path.
References
- Package: crates.io/crates/quinn-proto
- Advisory: rustsec.org/advisories/RUSTSEC-2026-0037.html
- Web: github.com/quinn-rs/quinn/pull/2559
From the RustSec Advisory Database (CC0-1.0) via the OSV export, downloaded Oct 24, 2026. Severity score computed from the published CVSS vector.
Other advisories for quinn-proto
- Vulnerability HighRUSTSEC-2023-0063 · 2023-09-21Denial of service in Quinn servers
- Vulnerability HighRUSTSEC-2024-0373 · 2024-09-02`Endpoint::retry()` calls can lead to panicking
- Vulnerability HighRUSTSEC-2026-0185 · 2026-06-22 Remote memory exhaustion in quinn-proto from unbounded out-of-order stream reassembly
- VulnerabilityRUSTSEC-2026-0338 · 2026-09-14Remote peer can panic quinn-proto with zero-length STREAM frames during unordered reads
- VulnerabilityRUSTSEC-2026-0339 · 2026-08-17Unbounded growth of pending connection ID retirements in quinn-proto
- Vulnerability HighRUSTSEC-2026-0340 · 2026-09-14Peer minimum ACK delay can panic quinn-proto when ACK_FREQUENCY transmission is enabled
- Vulnerability HighRUSTSEC-2026-0341 · 2026-08-17Stream reassembly memory-exhaustion guard in quinn-proto can be bypassed
- VulnerabilityRUSTSEC-2026-0342 · 2026-08-17Zero-length DATAGRAM frames bypass the receive buffer limit in quinn-proto
Up next
Same cratequinn-proto: security historyEvery advisory for this crate, and whether it is safe to use today.Read it next →Did this answer your question?