CVE-2026-120212
Web::Simple versions before 0.037 for Perl do not escape single quotes in HTML::Tags output
Published Nov 10, 2026
CVSS n/a
EPSS < 1%
KEV · Not listed
Description
Web::Simple versions before 0.037 for Perl do not escape single quotes in HTML::Tags output.
HTML::Tags and XML::Tags escape a plain string value by replacing only &, ", < and > with entities. A value interpolated into a single-quoted attribute, as in <a href='$value'>, can therefore close the attribute and add new ones, such as an event handler. Double-quoted attributes are not affected.
An attacker who controls a value that an application interpolates into a single-quoted attribute can inject script into the generated page.
HTML::Tags and XML::Tags escape a plain string value by replacing only &, ", < and > with entities. A value interpolated into a single-quoted attribute, as in <a href='$value'>, can therefore close the attribute and add new ones, such as an event handler. Double-quoted attributes are not affected.
An attacker who controls a value that an application interpolates into a single-quoted attribute can inject script into the generated page.
Affected Products
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CVE record
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NVD configurations
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Red Hat packages
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OpenCVE enrichment
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Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
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No data available yet.
Remediation
Vendor Solution
Upgrade to Web-Simple 0.037 or later.
Vendor Workaround
Use double-quoted attributes for values that may contain untrusted data.
Tracking
Advisories
Metrics
No CVSS v4.0
No CVSS v3.1
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.218% probability within 30 days)
Key SSVC decision points have not yet been added.
References
History
Nov 10, 2026 5:45 PM
Description updated. Title updated. Weaknesses updated. Added references
View changes
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Web::Simple versions before 0.037 for Perl do not escape single quotes in HTML::Tags output. HTML::Tags and XML::Tags escape a plain string value by replacing only &, ", < and > with entities. A value interpolated into a single-quoted attribute, as in <a href='$value'>, can therefore close the attribute and add new ones, such as an event handler. Double-quoted attributes are not affected. An attacker who controls a value that an application interpolates into a single-quoted attribute can inject script into the generated page. | |
| Title | Web::Simple versions before 0.037 for Perl do not escape single quotes in HTML::Tags output | |
| Weaknesses | CWE-79 | |
| References |
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Subscriptions
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Weaknesses
