Medium 5.1Published Aug 31, 2026

CVE-2026-76985Apache Wicket: XSS in Palette via getAdditionalAttributes

Updated under an hour ago (2026-10-19 07:00 UTC)

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It affects Apache Software Foundation Apache Wicket and 1 other product. Add what you run to find out whether that includes you.

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Every CVE for Apache Software Foundation Apache Wicket

Exploited in the last 30 days

Improper neutralization of input during web page generation in Apache Wicket. org.apache.wicket.extensions.markup.html.form.palette.component.AbstractOptions, which renders the two option lists of a Palette, escapes the id and the display value of each option according to the escape-model-strings setting, and wrote the attribute names and values returned by getAdditionalAttributes into the <option> tag as they came. An application is affected where it overrides Palette.getAdditionalAttributesForChoices, Palette.getAdditionalAttributesForSelection or AbstractOptions.getAdditionalAttributes and returns a value holding data an attacker can influence. These methods return null by default, so an application that does not override them is not affected. As a workaround, escape the values 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 1.4.0 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.

CVSS: 5.1 MEDIUM (v4.0, CNA)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:Green
Weakness (CWE): CWE-79
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: apache
NVD analysis: Analyzed
Record last updated: Aug 31, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Apache Software Foundation Apache Wicket apache_software_foundation:apache_wicket (from the name)	from 8.0.0 through 8.18.0; from 9.0.0 through 9.23.0; from 10.0.0 through 10.10.0	CNA record
apache wicket apache:wicket	from 8.0.0 before 8.19.0; from 9.0.0 before 9.24.0; from 10.0.0 before 10.11.0	NVD

References

https://lists.apache.org/thread/0x2x12x22ff4yq4rhqokb2fjhtsd0f0jvendor-advisory, mailing-list
http://www.openwall.com/lists/oss-security/2026/08/31/5mailing-list, third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.