Crafted input may cause the jsoup HTML and XML parser to get stuck, timeout, or throw unchecked exceptions

Summary

jsoup is a Java library for working with HTML. Those using jsoup versions prior to 1.14.2 to parse untrusted HTML or XML may be vulnerable to DOS attacks. If the parser is run on user supplied input, an attacker may supply content that causes the parser to get stuck (loop indefinitely until cancelled), to complete more slowly than usual, or to throw an unexpected exception. This effect may support a denial of service attack. The issue is patched in version 1.14.2. There are a few available workarounds. Users may rate limit input parsing, limit the size of inputs based on system resources, and/or implement thread watchdogs to cap and timeout parse runtimes.

Timeline

1. Aug 18, 2021, 3:10 PM UTCCVE published
2. Oct 8, 2026, 8:58 PM UTCCISA SSVC assessment

   Exploitation: none · Automatable: yes · Technical impact: partial

3. Oct 8, 2026, 9:03 PM UTCRecord last updated

Affected versions

• jhy jsoup

  fixed in 1.14.2

• org.jsoup:jsoupMaven

  fixed in 1.14.2

References 14