{"id":"CVE-2004-0189","aliases":["DEBIAN-CVE-2004-0189","DSA-474","EUVD-2004-0189","GHSA-wgp5-p97p-cph9","RHSA-2004:133"],"status":"published","title":"The \"%xx\" URL decoding function in Squid 2.5STABLE4 and earlier allows remote attackers to bypass...","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.","severity":{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.13807,"percentile":0.96542,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":true},"published":"2004-03-15T05:00:00Z","modified":"2026-10-21T15:47:31Z","exploits":[{"source":"exploitdb","id":"EDB-23777","title":"Squid Proxy 2.4/2.5 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