{"cve":"CVE-2015-3183","nvd":{"published":"2015-07-20T23:59:02.877","modified":"2026-06-17T00:25:28.920","status":"Modified","description":"The chunked transfer coding implementation in the Apache HTTP Server before 2.4.14 does not properly parse chunk headers, which allows remote attackers to conduct HTTP request smuggling attacks via a crafted request, related to mishandling of large chunk-size values and invalid chunk-extension characters in modules/http/http_filters.c.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-17","CWE-20"],"references":["http://httpd.apache.org/security/vulnerabilities_24.html","http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10735","http://lists.apple.com/archives/security-announce/2015/Aug/msg00001.html","http://lists.apple.com/archives/security-announce/2015/Sep/msg00004.html","http://lists.opensuse.org/opensuse-updates/2015-10/msg00011.html"],"products":["apache:http_server"],"source":"nvd","synced_at":"2026-10-19T20:36:40.444340523+00:00"},"epss":{"cve":"CVE-2015-3183","score":0.74387,"percentile":0.99492,"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."]}