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CGI versions before 5.00 for Perl return request-derived values untainted under taint mode.

CVE-2026-120642

CGI versions before 5.00 for Perl return request-derived values untainted under taint mode. The upload filename, uploadInfo values, some pathinfo and scriptname values, Accept results, and the name lists from urlparam and cookie are returned without the taint flag, as is a cookie named expires from 4.67 on. These values come from regex captures or hash keys, which Perl does not taint, so they pass -T checks unvalidated.

Assessment

CVSS
Not yet scored
Severity
Unscored
Known exploited
Not listed in CISA KEV
Exploit availability
Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published
3 November 2026
Last updated
3 November 2026
Assigner
CPANSec

At the source

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