Is CVE-2026-120212 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-120212 being exploited in the wild.

How severe is CVE-2026-120212?

Informational severity, published 10 November 2026.

Is there a fix for CVE-2026-120212?

Yes: fixed in 0.037. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-120212 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-120212?

Check whether you run Perl Web::Simple at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-120212: Web::Simple HTML::Tags single-quoted attribute XSS

CVE-2026-120212 · Severity: info · Published 2026-11-10

Web::Simple is a Perl framework for building web applications. Its HTML::Tags module fails to escape single quotes in attribute values, allowing an attacker to break out of single-quoted HTML attributes and inject malicious scripts into web pages. This could lead to session hijacking, credential theft, or malware distribution to users of affected applications.

Technologies: Perl Web::Simple. Vendors: Perl.

Quick answers

Is CVE-2026-120212 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-120212 being exploited in the wild.
How severe is CVE-2026-120212?: Informational severity, published 10 November 2026.
Which products and versions are affected?: Perl Web::Simple before 0.037.
Is there a fix for CVE-2026-120212?: Yes: fixed in 0.037. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-120212 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-120212?: Check whether you run Perl Web::Simple at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: 0.037

Technical details

The HTML::Tags and XML::Tags modules in Web::Simple only escape &, ", <, and > characters in string values, omitting single quotes. When a user-controlled value is interpolated into a single-quoted attribute (e.g. href='$value'), an attacker can close the attribute with a quote and inject new attributes including event handlers. Double-quoted attributes are unaffected because double quotes are escaped.

Affected products

Perl Web::Simple before 0.037

Timeline

2026-11-10: disclosed

References

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