CVE-2026-120643

CGI versions from 4.62 before 5.00 for Perl allow cross-site scripting via a raw apostrophe in URLs returned by url and self_url

State: Published
Severity: Not scored
Published: Nov 3, 2026
Updated: Nov 3, 2026
Reserved: Nov 2, 2026

Read the record on cve.org

Description

CGI versions from 4.62 before 5.00 for Perl allow cross-site scripting via a raw apostrophe in URLs returned by url and self_url.

Both pass the URL through URI's canonical method, which leaves an apostrophe in the path raw and decodes the %27 that query parameter escaping produces, so an apostrophe in the request path or a parameter appears raw in the result.

An application that places the URL in a single-quoted HTML attribute or JavaScript string is open to cross-site scripting.

Scores

The record has no CVSS score.

Weaknesses

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Affected Products

Product	Versions
CGI	4.62 to before 5.00Affected

References

https://metacpan.org/release/LEEJO/CGI-4.72/source/lib/CGI.pmtechnical-description
https://metacpan.org/release/LEEJO/CGI-5.00/changesrelease-notes
https://github.com/leejo/CGI.pm/commit/851430be84c4d0f350681814e1d7718b9959f2c2.patchpatch

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