High 8.7Published Mar 10, 2026

CVE-2026-31812Quinn affected by unauthenticated remote DoS via panic in QUIC transport parameter parsing

Updated under an hour ago (Oct 28, 2026, 3:00 AM ET)

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It affects quinn-rs quinn and 10 other products. Add what you run to find out whether that includes you.

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Every CVE for quinn-rs quinn

Exploited in the last 30 days

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.

CVSS: 8.7 HIGH (v4.0, CNA)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
Weakness (CWE): CWE-248
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Aug 25, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

quinn-rs quinn quinn_rs:quinn (from the name)	before 0.11.14	CNA record
Red Hat Logging Subsystem for Red Hat OpenShift 6.4 redhat:logging	from 1780052069 not affected	CISA ADP
Red Hat Red Hat Ansible Automation Platform 2.6 redhat:ansible_automation_platform	from 1777398576 not affected	CISA ADP
Red Hat Red Hat OpenShift AI 3.3 redhat:openshift_ai	from 1778596806 not affected	CISA ADP
Red Hat Red Hat Trusted Artifact Signer 1.3 redhat:trusted_artifact_signer	from 1773307309 not affected	CISA ADP
Red Hat Confidential Compute Attestation redhat:confidential_compute_attestation	1	CISA ADP
Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux	10	CISA ADP
Red Hat Red Hat Enterprise Linux AI (RHEL AI) 3 redhat:enterprise_linux_ai	3	CISA ADP
Red Hat Red Hat OpenShift Container Platform 4 redhat:openshift	4	CISA ADP
Red Hat Red Hat OpenShift Update Service redhat:openshift_update_service	5	CISA ADP
1–10 of 11

References

References

https://github.com/quinn-rs/quinn/security/advisories/GHSA-6xvm-j4wr-6v98	x-refsource-confirm
https://access.redhat.com/errata/RHSA-2026:13545
https://access.redhat.com/errata/RHSA-2026:19712
https://access.redhat.com/errata/RHSA-2026:22862
https://access.redhat.com/errata/RHSA-2026:5459
https://access.redhat.com/security/cve/CVE-2026-31812
https://bugzilla.redhat.com/show_bug.cgi?id=2446330
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-31812.json

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.