Improper neutralization of input during web page generation in Apache Wicket. (CVE-2026-76983)
Description
Apache Wicket versions 8.0.0 through 8.18.0, 9.0.0 through 9.23.0, and 10.0.0 through 10.10.0 suffer from improper neutralization of input during web page generation via the <wicket:label> tag. The vulnerability arises because the label content is rendered unescaped when set through FormComponent#setLabel(IModel), allowing potentially attacker-controlled input to be included as markup. There is no workaround, but fixed versions 8.19.0, 9.24.0, and 10.11.0 address this issue.
CVSS v4.0
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Apache Wicket involves the <wicket:label> tag provided by AutoLabelTextResolver, which writes label content into markup without escaping. When the label is set via FormComponent#setLabel(IModel), the label is rendered unescaped, potentially allowing injection of markup if the label content is attacker-controlled. The resolver does not respect the escape-model-strings setting, and no workaround exists. The issue affects multiple supported versions of Apache Wicket and was fixed in versions 8.19.0, 9.24.0, and 10.11.0.
Potential Impact
An attacker able to influence the label of a form component could inject unescaped markup into web pages generated by Apache Wicket, potentially leading to cross-site scripting (XSS) vulnerabilities. The impact depends on whether the application uses attacker-controllable data in labels. There are no known exploits in the wild. The vulnerability is rated medium severity.
Mitigation Recommendations
Users should upgrade Apache Wicket to versions 8.19.0, 9.24.0, or 10.11.0 or later, which contain the official fix for this vulnerability. There is no workaround available for affected versions. Applications should avoid using untrusted input in labels until upgraded.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-5445-5xcv-f4gr
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-76983"]
- Database Specific Severity
- MODERATE
- Cvss Version
- 4.0
Threat ID: 6a95a0dfacd9273b4947df4c
Added to database: 08/31/2026, 15:42:23 UTC
Last enriched: 09/09/2026, 11:39:14 UTC
Last updated: 10/13/2026, 18:48:23 UTC
Views: 46
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