CVE-2026-71497
MEDIUM
MEDIUM
Priority: 0.01
BB Relevance:
49/100
Published: 2026-08-06
Modified: 2026-10-24
First seen: 2026-10-29
Status: active
Attack Surface
Network
No Auth
Scope Change
CVSS Vector Breakdown
AV:
Network
AC:
High
PR:
None
UI:
Required
S:
Changed
C:
Low
I:
Low
A:
None
Description
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.