CVE-2026-120648: CGI versions before 5.00 for Perl allow HTML injection via text containing --> in comment
Source GCVE Database
Not known to be exploited : upgrade to 5.00 soon.
Data as of 4 Nov 2026, 01:58 UTC
Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD
Thin evidence
One scorer or none- Patch
- Available – fixed in 5.00
Exploitation evidence
Disclosed: evidence found.
CVE published 3 Nov 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 3 Nov 2026.
What to do
Upgrade CGI (Perl module) to 5.00.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| CGI | Affected
| Fixed in
|
CPANCGIpkg:cpan/CGIOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Since the vulnerability involves improper escaping of input within HTML comments, developers should avoid placing unescaped user input inside HTML comments or implement proper escaping to prevent premature comment termination. Monitor vendor advisories for any forthcoming patches or official fixes.
Description
CGI versions for Perl prior to 5.00 contain a vulnerability that allows HTML injection when text containing the sequence '-->' is included in comments. This occurs because arguments are placed between <!-- and --> without proper escaping, allowing an attacker to prematurely close the comment and inject HTML content into the page.