jsoup is a Java library for working with real-world HTML. From 1.14.3 until 1.23.1, jsoup's HTML parser could incorrectly handle a malformed tag name ending in a control character, causing the tag to acquire the parsing behavior of a different element. When a custom Safelist permits certain raw-text elements, this misparsing can cause content that should remain inert text to be emitted as active markup after serialization, potentially resulting in cross-site scripting. jsoup's built-in Safelists are not affected. This issue is fixed in version 1.23.1.

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2026-2150 advisory.

    jsoup is a Java library for working with real-world HTML. From 1.14.3 until 1.23.1, jsoup's HTML parser     could incorrectly handle a malformed tag name ending in a control character, causing the tag to acquire     the parsing behavior of a different element. When a custom Safelist permits certain raw-text elements,     this misparsing can cause content that should remain inert text to be emitted as active markup after     serialization, potentially resulting in cross-site scripting. jsoup's built-in Safelists are not affected.
    This issue is fixed in version 1.23.1. (CVE-2026-71497)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - jsoup is a Java library for working with real-world HTML. From 1.14.3 until 1.23.1, jsoup's HTML parser
    could incorrectly handle a malformed tag name ending in a control character, causing the tag to acquire
    the parsing behavior of a different element. When a custom Safelist permits certain raw-text elements,
    this misparsing can cause content that should remain inert text to be emitted as active markup after
    serialization, potentially resulting in cross-site scripting. jsoup's built-in Safelists are not affected.
    This issue is fixed in version 1.23.1. (CVE-2026-71497)

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - jsoup is a Java library for working with real-world HTML. From 1.14.3 until 1.23.1, jsoup's HTML parser     could incorrectly handle a malformed tag name ending in a control character, causing the tag to acquire     the parsing behavior of a different element. When a custom Safelist permits certain raw-text elements,     this misparsing can cause content that should remain inert text to be emitted as active markup after     serialization, potentially resulting in cross-site scripting. jsoup's built-in Safelists are not affected.
    This issue is fixed in version 1.23.1. (CVE-2026-71497)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
345782	Amazon Linux 2023 : jsoup (ALAS2023-2026-2150)	Nessus	Amazon Linux Local Security Checks	Local	medium
445753	SCA: security update for org.jsoup:jsoup (GHSA-pmhh-3w7g-xqp8)	Tenable Cloud Security	SCA Checks	Local	medium
445753	SCA: security update for org.jsoup:jsoup (GHSA-pmhh-3w7g-xqp8)	Tenable Self-Hosted Container Security	SCA Checks	Local	medium
333319	Linux Distros Unpatched Vulnerability : CVE-2026-71497	Nessus	Misc.	Local	medium

Detections

Analytics

CVE-2026-71497

medium

Tenable Plugins

medium

medium

medium

medium