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CVE-2026-76982— Apache Wicket: XSS in Button via its model object

Quick assessment

Affected
Apache Software Foundation Apache Wicket
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Apache Wicket是美国Apache基金会的一款Java Web应用开发框架。 Apache Wicket 8.0.0版本至8.18.0版本、9.0.0版本至9.23.0版本和10.0.0版本至10.10.0版本存在跨站脚本漏洞，该漏洞源于Button组件在渲染为<button>元素时未对模型对象中的内容进行转义，可能导致跨站脚本攻击。

CVSS 5.1 · Medium EPSS 0.51% · P42

Affected Version Matrix 3

VendorProduct Version RangeStatus
Apache Software Foundation Apache Wicket 8.0.0≤ 8.18.0 affected
9.0.0≤ 9.23.0 affected
10.0.0≤ 10.10.0 affected
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I. Basic Information for CVE-2026-76982

Vulnerability Information
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Vulnerability Title
Apache Wicket: XSS in Button via its model object
Source: CVE Program / CVE List V5
Vulnerability Description
Improper neutralization of input during web page generation in Apache Wicket. org.apache.wicket.markup.html.form.Button clears the escape-model-strings flag in its constructor, so that the value attribute it writes is not encoded twice — ComponentTag already encodes attribute values when it writes the tag. That reasoning holds only for the attribute. When the component is attached to a <button> element rather than an <input>, it writes its model object into the element body instead, and nothing encodes an element body, so markup in the model is rendered as markup. An application is affected where it renders a Button on a <button> element and that button's model holds data an attacker can influence. Wicket cannot determine where a model value comes from, so whether it reaches the page from a request or from storage is a property of the application. The subclasses that inherit this constructor — AjaxButton, AjaxFallbackButton and WizardButton — are affected on the same terms. As a workaround, calling setEscapeModelStrings(true) on a button that renders as a <button> element escapes the body correctly, and does not cause double encoding, because the value attribute is written only for <input> elements. This issue affects Apache Wicket: from 8.0.0 through 8.18.0, from 9.0.0 through 9.23.0, from 10.0.0 through 10.10.0. Older, unsupported releases from 6.25.0 and 7.5.0 onwards are also affected. Users are recommended to upgrade to version 8.19.0, 9.24.0 or 10.11.0, which fix the issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/U:Amber
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Apache Wicket 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache Wicket是美国Apache基金会的一款Java Web应用开发框架。 Apache Wicket 8.0.0版本至8.18.0版本、9.0.0版本至9.23.0版本和10.0.0版本至10.10.0版本存在跨站脚本漏洞，该漏洞源于Button组件在渲染为<button>元素时未对模型对象中的内容进行转义，可能导致跨站脚本攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Apache Software Foundation Apache Wicket 8.0.0 ~ 8.18.0 -

II. Public POCs for CVE-2026-76982

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III. Intelligence Information for CVE-2026-76982

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Mailing List Discussions for CVE-2026-76982 (1)

Same Patch Batch · Apache Software Foundation · 2026-08-31 · 10 CVEs total

CVE-2026-58301 5.9 MEDIUM Apache Shiro: Server-side POST request may be steered to an alternate host
CVE-2026-76985 5.1 MEDIUM Apache Wicket: XSS in Palette via getAdditionalAttributes
CVE-2026-76983 5.1 MEDIUM Apache Wicket: XSS in AutoLabelTextResolver via FormComponent.setLabel
CVE-2026-76984 5.1 MEDIUM Apache Wicket: XSS in MetaDataHeaderItem via addTagAttribute
CVE-2026-75802 5.1 MEDIUM Apache Wicket: XSS in AjaxEditableLabel and its subclasses via IChoiceRenderer and default
CVE-2026-76986 Apache Wicket: XSS in AbstractSingleSelectChoice via getNullValidDisplayValue
CVE-2026-71378 Apache Wicket: Cross-Site Request Forgery (CSRF) protection bypass in ResourceIsolationReq
CVE-2026-71257 Apache Wicket: Configured file upload limits are not enforced when the multipart request h
CVE-2026-70449 Apache Wicket: Path traversal in resource style/variation/locale

IV. Related Vulnerabilities

Same product: Apache Wicket
Same vendor: Apache Software Foundation
Same weakness: CWE-79

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