{"id":"CVE-2026-94450","published":"2026-09-22T21:17:33.867","lastModified":"2026-09-23T17:58:37.490","description":"Improper validation of the Destination Connection ID length in s2n-quic 1.88.0 and earlier may allow an unauthenticated remote user to cause a denial of service by shutting down a server endpoint via a single crafted UDP datagram. Only server endpoints specifically configured to send Retry packets are affected.\n\n\n\nTo remediate this issue, users should upgrade to version v1.89.0 or later.","cvssScore":7.5,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwes":["CWE-1284"],"vendors":[],"products":[],"references":[{"url":"https://aws.amazon.com/security/security-bulletins/2026-116-aws/","tags":[]},{"url":"https://github.com/aws/s2n-quic/releases/tag/v1.89.0","tags":[]},{"url":"https://github.com/aws/s2n-quic/security/advisories/GHSA-5rw2-6x5m-v22x","tags":[]}],"exploitRefs":[{"url":"https://github.com/aws/s2n-quic/releases/tag/v1.89.0","tags":[]},{"url":"https://github.com/aws/s2n-quic/security/advisories/GHSA-5rw2-6x5m-v22x","tags":[]}],"hasPoc":true,"ai":null}