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CVE-2026-120637— CGI versions before 5.00 for Perl take request parameters from the process command line arguments for an unrecognised REQUEST_METHOD

Quick assessment

Affected
CVE-2026-120637
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Perl 的 CGI 模块在 5.00 版本之前，当遇到无法识别的 REQUEST_METHOD 时，会从进程命令行参数中读取请求参数。 例如，当 REQUEST_METHOD 为 OPTIONS 时，CGI 模块会回退到其默认开启的离线调试模式，并基于进程的命令行参数来构建请求参数和 path_info。

AI Predicted 7.5 Difficulty: Easy

Possible ATT&CK Techniques 1 AI

T1059.006 · Python

I. Basic Information for CVE-2026-120637

Vulnerability Information
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Vulnerability Title
CGI versions before 5.00 for Perl take request parameters from the process command line arguments for an unrecognised REQUEST_METHOD
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
遗留的调试代码
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
- - 0 ~ 5.00 -

II. Public POCs for CVE-2026-120637

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-120637

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Other References for CVE-2026-120637 (3)

IV. Related Vulnerabilities

Same weakness: CWE-489