Paper/Archive/CVE-2026-120637

CVE-2026-120637

CPANSec — CGI versions before 5.00 for Perl take request parameters from the process command line arguments for an unrecognised REQUEST_METHOD

EPSS 0.2%CVSS 9.8

critical.is priorityof 100

CVSS 9.8 (ADP)9.8 / 10 × 3029.4 Not in CISA KEV+300.0 EPSS percentile 8.8.088 × 201.8 No public exploit+100.0 SSVC exploitation: none+100.0

Description · from the CVE record

CGI versions before 5.00 for Perl take request parameters from the process command line arguments for an unrecognised REQUEST_METHOD. For a REQUEST_METHOD such as OPTIONS, CGI falls through to its offline debugging mode, which is on by default, and builds the parameters and path_info from the process's command line arguments.

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.pm refmetacpan.org/release/LEEJO/CGI-5.00/changes patchgithub.com/leejo/CGI.pm/commit/b753ff75a3bc4554c075cc37c1db605a55297029.patch