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CVE-2026-75802 Apache Software Foundation CVE debrief

The Apache Wicket project has addressed a medium-severity vulnerability in several AjaxEditable components. CVE-2026-75802 describes an issue where user-influenced data can be injected as HTML or script into the rendered label of certain Wicket components, affecting users viewing the page. The vulnerability exists when using a non-null IChoiceRenderer with AjaxEditableChoiceLabel or when overriding the defaultNullLabel() method in AjaxEditableLabel, AjaxEditableChoiceLabel, or AjaxEditableMultiLineLabel. The issue impacts Wicket versions 8.0.0 through 8.18.0, 9.0.0 through 9.23.0, and 10.0.0 through 10.10.0, as well as older, unsupported releases.

Vendor
Apache Software Foundation
Product
Apache Wicket
CVSS
MEDIUM 5.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-08-31
Original CVE updated
2026-08-31
Advisory published
2026-08-31
Advisory updated
2026-08-31

Who should care

Developers and administrators using 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 should be aware of this vulnerability and take steps to mitigate it. This includes upgrading to patched versions and reviewing Wicket component usage.

Technical summary

The vulnerability exists in AjaxEditableChoiceLabel when constructed with a non-null IChoiceRenderer, and in AjaxEditableLabel, AjaxEditableChoiceLabel, and AjaxEditableMultiLineLabel when the component's model is empty and defaultNullLabel() is overridden. User-influenced data can be injected as HTML or script into the rendered label, affecting users viewing the page. The issue impacts Wicket versions 8.0.0 through 8.18.0, 9.0.0 through 9.23.0, and 10.0.0 through 10.10.0.

Defensive priority

Upgrade to patched versions 8.19.0, 9.24.0, or 10.11.0. Inventory and review Wicket component usage, focusing on AjaxEditableChoiceLabel and custom defaultNullLabel() implementations. Apply compensating controls like output encoding and Content Security Policy.

Recommended defensive actions

  • Upgrade to Apache Wicket version 8.19.0, 9.24.0, or 10.11.0
  • Inventory Wicket component usage, focusing on AjaxEditableChoiceLabel and custom defaultNullLabel() implementations
  • Apply output encoding and Content Security Policy as compensating controls
  • Monitor for suspicious activity and exception tracking in Wicket applications
  • Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
  • Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance
  • Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed

Evidence notes

The CVE description provides details on the vulnerability in Apache Wicket's AjaxEditable components. Evidence is based on the official CVE Program record and NIST NVD vulnerability detail. Limited information is available on potential exploits or affected systems beyond version details.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-75802 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-75802

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-75802 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-75802

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.