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CVE-2026-5090

6.1 · MEDIUM

Template::Plugin::HTML versions through 3.102 for Perl allows HTML and JavaScript to be injected.

Published May 19, 2026CWE-79EPSS 0.34%

Overview

CVE-2026-5090 is a medium-severity vulnerability. It was published on May 19, 2026 and has a CVSS 3.1 base score of 6.1 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 6.1, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Template::Plugin::HTML versions through 3.102 for Perl allows HTML and JavaScript to be injected.

The html_filter function did not escape single quotes. HTML attributes inside of single quotes could be have code injected. For example, the variable "var" in

<a id='ref' title='[% var | html %]'>

would not be properly escaped. An attacker could insert some limited HTML and JavaScript, for example,

var = " ' onclick='while (true) { alert(1) }'"

Note that arbitrary HTML and JavaScript would be difficult to inject, because angle brackets, ampersands and double-quotes would still be escaped.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/abw/Template2/issues/327GitHubgithub.com/abw/Template2/pull/337/changes/11c78a7a771d4af505efeb754a0b8775689c2eaeRefwww.openwall.com/lists/oss-security/2026/05/19/40

How CyberStrike helps

Frequently asked questions

What is CVE-2026-5090?

CVE-2026-5090 is a medium-severity vulnerability. It was published on May 19, 2026 and has a CVSS 3.1 base score of 6.1 (MEDIUM).

How severe is CVE-2026-5090?

This vulnerability has a CVSS 3.1 base score of 6.1, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-5090?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-5090?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-5090 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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