MEDIUM 4.7 NVD
CVE-2026-71497
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
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.
References
- https://github.com/jhy/jsoup/commit/92f1aca552548b484bc7d4b94c51e48b8e6eca70
- https://github.com/jhy/jsoup/issues/2538
- https://github.com/jhy/jsoup/releases/tag/jsoup-1.23.1
- https://github.com/jhy/jsoup/security/advisories/GHSA-pmhh-3w7g-xqp8
This medium severity vulnerability with a CVSS score of 4.7 was published on 2026-08-06 via NVD.
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