{"cve":"CVE-2024-23327","nvd":{"published":"2024-02-09T23:15:09.647","modified":"2026-06-17T07:12:36.200","status":"Modified","description":"Envoy is a high-performance edge/middle/service proxy. When PPv2 is enabled both on a listener and subsequent cluster, the Envoy instance will segfault when attempting to craft the upstream PPv2 header. This occurs when the downstream request has a command type of LOCAL and does not have the protocol block. This issue has been addressed in releases 1.29.1, 1.28.1, 1.27.3, and 1.26.7. Users are advised to upgrade. There are no known workarounds for this vulnerability.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-476"],"references":["https://github.com/envoyproxy/envoy/commit/63895ea8e3cca9c5d3ab4c5c128ed1369969d54a","https://github.com/envoyproxy/envoy/security/advisories/GHSA-4h5x-x9vh-m29j","https://github.com/envoyproxy/envoy/commit/63895ea8e3cca9c5d3ab4c5c128ed1369969d54a","https://github.com/envoyproxy/envoy/security/advisories/GHSA-4h5x-x9vh-m29j"],"products":["envoyproxy:envoy"],"source":"nvd","synced_at":"2026-10-19T21:45:59.823092188+00:00"},"epss":{"cve":"CVE-2024-23327","score":0.00693,"percentile":0.52929,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}