{"id":"CVE-2026-94450","summary":"Potential denial of service when configured to send Retry packets in s2n-quic","details":"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.","aliases":["GHSA-5rw2-6x5m-v22x"],"modified":"2026-09-25T03:30:28.689065102Z","published":"2026-09-22T20:04:44.360Z","database_specific":{"cwe_ids":["CWE-1284"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/94xxx/CVE-2026-94450.json","cna_assigner":"AMZN"},"references":[{"type":"ADVISORY","url":"https://aws.amazon.com/security/security-bulletins/2026-116-aws/"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/94xxx/CVE-2026-94450.json"},{"type":"ADVISORY","url":"https://github.com/aws/s2n-quic/security/advisories/GHSA-5rw2-6x5m-v22x"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-94450"},{"type":"FIX","url":"https://github.com/aws/s2n-quic/releases/tag/v1.89.0"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/aws/s2n-quic","events":[{"introduced":"0"},{"fixed":"845f1cce431e30fc9c3802fda0a7fb0d65c201be"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"last_affected":"1.88.0"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["v1.88.0","v1.87.0","v1.86.0","v1.85.0","v1.84.0","v1.83.0","v1.82.0","v1.81.0","v1.80.0","v1.79.0","v1.78.0","v1.77.0","v1.76.0","v1.75.0","v1.74.0","v1.73.0","v1.72.0","v1.71.0","v1.70.0","v1.69.0","v1.68.0","v1.67.0","v1.66.0","v1.65","v1.64.0","v1.63.0","v1.62.0","v1.61.0","v1.60.0","v1.59.0","v1.58.0","v1.57.0","v1.56.0","v1.55.0","v1.54.0","v1.52.1","v1.52.0","v1.51.0","v1.50.0","v1.49.0","v1.48.0","v1.47.0","v1.46.0","v1.45.0","v1.43.0","v1.42.0","v1.41.0","v1.40.0","v1.39.0","v1.38.1","v1.38.0","v1.37.0","v1.36.0","v1.35.1","v1.35.0","v1.34.0","v1.33.0","v1.32.0","v1.31.0","v1.30.0","v1.29.0","v1.28.0","v1.27.0","v1.26.0","v1.25.0","v1.24.0","v1.23.0","v1.22.0","v1.21.0","v1.20.0","v1.19.0","v1.18.0","v1.17.1","v1.16.0","v1.15.0","v1.14.0","v1.13.0","v1.12.0","v1.11.0","v1.10.0","v1.9.2","v1.9.1","v1.9.0","v1.8.0","v1.7.0","v1.6.1","v1.6.0","v1.5.0","v1.4.0","v1.3.0","v1.2.0","v1.1.1","v1.1.0","v1.0.2","v1.0.1","v1.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-94450.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"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"}]}