CVE-2026-71497 jsoup: Cleaner may expose markup with custom raw-text elements
Attackers can trigger cross-site scripting in jsoup when custom Safelists permit raw-text elements, due to incorrect parsing of malformed tags.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-71497?
CVE-2026-71497 is a medium-severity cross-site scripting vulnerability in jhy jsoup, published on 6 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-79
Which versions are affected by CVE-2026-71497?
2 open source packages ship an affected version, including org.jsoup:jsoup.
| Package | Affected | Fixed in |
|---|---|---|
org.jsoup:jsoup Maven | From 1.14.3 | 1.23.1 |
org.jsoup:jsoup Maven | From 1.14.3 | 1.23.1 |
How do I fix CVE-2026-71497?
Upgrade org.jsoup:jsoup to 1.23.1 or later.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-71497 being exploited?
There is no known exploitation of CVE-2026-71497 in the wild and no public exploit code.
Sources
Also known as AZL-95475, CLEANSTART-2026-BY71102, CLSA-2026-1787667194, DEBIAN-CVE-2026-71497, ECHO-9cfc-4e75-922c, GHSA-pmhh-3w7g-xqp8 and 23 more.