{"cve":"CVE-2009-2622","nvd":{"published":"2009-07-28T17:30:01.127","modified":"2026-06-16T23:09:51.600","status":"Modified","description":"Squid 3.0 through 3.0.STABLE16 and 3.1 through 3.1.0.11 allows remote attackers to cause a denial of service via malformed requests including (1) \"missing or mismatched protocol identifier,\" (2) missing or negative status value,\" (3) \"missing version,\" or (4) \"missing or invalid status number,\" related to (a) HttpMsg.cc and (b) HttpReply.cc.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-20"],"references":["http://secunia.com/advisories/36007","http://www.mandriva.com/security/advisories?name=MDVSA-2009:161","http://www.mandriva.com/security/advisories?name=MDVSA-2009:178","http://www.securityfocus.com/bid/35812","http://www.securitytracker.com/id?1022607"],"products":["squid-cache:squid"],"source":"nvd","synced_at":"2026-10-19T19:54:07.895733559+00:00"},"epss":{"cve":"CVE-2009-2622","score":0.56908,"percentile":0.99067,"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."]}