Apache
CVE-2026-84231: Improper neutralization of input during web page generation in Apache Wicket. org.apache.wicket.markup.html.link.ExternalLink builds a JavaScript click handler
CVE-2026-84231 Nov 1, 2026 Source: Vendor
Improper neutralization of input during web page generation in Apache Wicket.
org.apache.wicket.markup.html.link.ExternalLink builds a JavaScript click handler and writes it into the tag's onclick attribute whenever the markup tag the component is bound to is not an a, link or area element. The URL held in the component's model is concatenated into a single-quoted JavaScript string literal in that handler without being escaped for that context. The same happens on the neighbouring branch, taken
Source of record
The credited names below are quoted verbatim from the vendor's own advisory:
https://nvd.nist.gov/vuln/detail/CVE-2026-84231
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Credited
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CVE-2026-84231
BR2026-0000-041102
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Credited as Emond Papegaaij