{"cve":"CVE-2011-2766","nvd":{"published":"2011-09-23T10:55:03.240","modified":"2026-06-16T23:31:57.633","status":"Modified","description":"The FCGI (aka Fast CGI) module 0.70 through 0.73 for Perl, as used by CGI::Fast, uses environment variable values from one request during processing of a later request, which allows remote attackers to bypass authentication via crafted HTTP headers.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-287"],"references":["http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=607479","http://www.debian.org/security/2011/dsa-2327","http://www.mandriva.com/security/advisories?name=MDVSA-2012:001","http://www.openwall.com/lists/oss-security/2011/09/08/1","http://www.openwall.com/lists/oss-security/2011/09/08/2"],"products":["debian:debian_linux","fast_cgi_project:fast_cgi"],"source":"nvd","synced_at":"2026-10-19T19:58:50.521460154+00:00"},"epss":{"cve":"CVE-2011-2766","score":0.07238,"percentile":0.94331,"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."]}