{"cve":"CVE-2004-0189","nvd":{"published":"2004-03-15T05:00:00.000","modified":"2026-06-16T22:05:07.943","status":"Modified","description":"The \"%xx\" URL decoding function in Squid 2.5STABLE4 and earlier allows remote attackers to bypass url_regex ACLs via a URL with a NULL (\"%00\") character, which causes Squid to use only a portion of the requested URL when comparing it against the access control lists.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["ftp://ftp.sco.com/pub/updates/UnixWare/SCOSA-2005.16/SCOSA-2005.16.txt","ftp://patches.sgi.com/support/free/security/advisories/20040404-01-U.asc","http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000838","http://marc.info/?l=bugtraq&m=108084935904110&w=2","http://security.gentoo.org/glsa/glsa-200403-11.xml"],"products":["squid:squid"],"source":"nvd","synced_at":"2026-10-19T19:37:11.487553034+00:00"},"epss":{"cve":"CVE-2004-0189","score":0.13807,"percentile":0.96519,"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."]}