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CVE-2026-76986— Apache Wicket: XSS in AbstractSingleSelectChoice via getNullValidDisplayValue

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.

这段描述涉及 Apache Wicket 框架中网页生成过程中的输入未正确中和（即潜在的安全漏洞，通常指未对来自用户或外部数据的 HTML/文本进行适当的转义/转义处理）。 Apache Wicket 中网页生成时的输入中和不当 是 的基类。该类在生成下拉选择框（ 元素）时，会将“默认选项”（即未选择任何选项时显示的条目）的内容原样写入标记（markup）中，而同一选择框中的其他选项内容则会根据 设置进行转义处理。这些默认选项的内容来源于 或 ，这两个方法均为 ，因此它们返回的值不一定是从资源束（resource

AI Predicted 6.3 Difficulty: Moderate

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter
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I. Basic Information for CVE-2026-76986

Vulnerability Information
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Vulnerability Title
Apache Wicket: XSS in AbstractSingleSelectChoice via getNullValidDisplayValue
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.AbstractSingleSelectChoice, the base class of DropDownChoice, writes the body of the default option — the entry shown when no choice is selected — into the markup as it is, while every other option body in the same select is escaped according to the escape-model-strings setting. The body comes from getNullValidDisplayValue() or getNullKeyDisplayValue(), both of which are protected, so what they return is not necessarily the plain text the default implementation reads from a resource bundle. An application is affected where it overrides one of those methods and returns a value holding data an attacker can influence, or where its own nullValid or null bundle entry holds such a value. The bundles shipped with Wicket contain plain text. RadioChoice overrides getDefaultChoice to emit no default option and is not affected. As a workaround, escape the value in the override. 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 1.5.0 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
N/A
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

Affected Products

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

II. Public POCs for CVE-2026-76986

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III. Intelligence Information for CVE-2026-76986

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Mailing List Discussions for CVE-2026-76986 (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-2026-76982 5.1 MEDIUM Apache Wicket: XSS in Button via its model object
CVE-2026-75802 5.1 MEDIUM Apache Wicket: XSS in AjaxEditableLabel and its subclasses via IChoiceRenderer and default
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

V. Comments for CVE-2026-76986

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