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CVE-2026-120647— CGI versions before 5.00 for Perl allow Content-Disposition parameter injection via unescaped double quotes in the header attachment filename

Quick assessment

Affected
CVE-2026-120647
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 版本之前存在 Content-Disposition 参数注入漏洞：当附件文件名中包含未转义的双引号时，攻击者可利用该缺陷注入恶意参数。 具体而言，调用 时，CGI 模块会将 直接写入 头部中“带引号的文件名”参数，而不会对双引号进行转义处理。 若应用程序将用户请求数据直接用作附件名称，攻击者即可构造恶意输入，诱导服务器在响应中插入第二个文件名参数，从而篡改客户端保存文件时所使用的实际文件名。

AI Predicted 6.5 Difficulty: Moderate EPSS 0.21% · P11

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
None None < 5.00 affected

I. Basic Information for CVE-2026-120647

Vulnerability Information
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Vulnerability Title
CGI versions before 5.00 for Perl allow Content-Disposition parameter injection via unescaped double quotes in the header attachment filename
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
对输出编码和转义不恰当
Source: CVE Program / CVE List V5

Affected Products

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

II. Public POCs for CVE-2026-120647

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III. Intelligence Information for CVE-2026-120647

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Other References for CVE-2026-120647 (3)

IV. Related Vulnerabilities

Same weakness: CWE-116