{"cve":"CVE-2011-3348","nvd":{"published":"2011-09-20T05:55:02.983","modified":"2026-06-16T23:33:07.193","status":"Modified","description":"The mod_proxy_ajp module in the Apache HTTP Server before 2.2.21, when used with mod_proxy_balancer in certain configurations, allows remote attackers to cause a denial of service (temporary \"error state\" in the backend server) via a malformed HTTP request.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-400"],"references":["http://community.jboss.org/message/625307","http://httpd.apache.org/security/vulnerabilities_22.html#2.2.21","http://lists.apple.com/archives/security-announce/2012/Feb/msg00000.html","http://marc.info/?l=bugtraq&m=131731002122529&w=2","http://marc.info/?l=bugtraq&m=132033751509019&w=2"],"products":["apache:http_server","redhat:jboss_enterprise_web_server"],"source":"nvd","synced_at":"2026-10-19T19:58:50.521460154+00:00"},"epss":{"cve":"CVE-2011-3348","score":0.2238,"percentile":0.97693,"date":"2026-10-31"},"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."]}