by Kastro
Paper/Archive/CVE-2026-120647

CVE-2026-120647

CPANSec — CGI versions before 5.00 for Perl allow Content-Disposition parameter injection via unescaped double quotes in the header attachment filename

EPSS 0.2%CVSS 9.8
critical.is priorityof 100
32
CVSS 9.8 (ADP)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 10.6.106 × 202.1No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

CGI versions before 5.00 for Perl allow Content-Disposition parameter injection via unescaped double quotes in the header attachment filename. header(-attachment => $name) writes $name into the quoted filename parameter of Content-Disposition without escaping double quotes. An application that passes request data as the attachment name can be made to send a second filename parameter, changing the name the response is saved under.

Affected

ProductAffectedFixed inSource
CGI< 5.005.00CNA

Scores by source

CISA ADP9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

writeupmetacpan.org/release/LEEJO/CGI-4.72/source/lib/CGI.pmrefmetacpan.org/release/LEEJO/CGI-5.00/changespatchgithub.com/leejo/CGI.pm/commit/131280a5c5bc51b65797bd57ef0ee8da8468065b.patch