5.4

CVE-2026-76983: apache software foundation apache wicket Cross-site Scripting

CVSS: 5.4v3.1MediumAnalyzed
Published 31-08-2026Last modified 31-08-2026
Open JSON

Vulnerability summary

CVE-2026-76983 is a medium (CVSS 5.4) Cross-site Scripting vulnerability in apache software foundation apache wicket. EPSS estimates a 0.51% chance of exploitation in the next 30 days, higher than 41.8% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.4/10
010
Medium · v3.1 (NVD)
EPSS score
0.51%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 31-08-2026
    PublishedVulnerability first disclosed.
  2. 31-08-2026
    Last modifiedVulnerability information updated.

Description

Improper neutralization of input during web page generation in Apache Wicket. The <wicket:label> tag is provided by org.apache.wicket.markup.html.form.AutoLabelTextResolver, which is registered by default in every WebApplication. The resolver writes the label it finds into the markup as it is, and reads no escaping setting at all, so markup in a label is rendered as markup. When the label comes from the labelled component's label model, set through FormComponent#setLabel(IModel), it is written to the markup unescaped. An application is affected where the label of a form component 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. There is no workaround. Unlike every other rendering path in Wicket, the resolver never consulted the escape-model-strings setting, so an application had no way to ask for the label to be escaped. The body of a <wicket:label> tag is markup by design and is not affected; it remains the supported way to place markup in a label. 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.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

0.51%

Chance of exploitation in the next 30 days

Percentile

42%

Versus all other CVEs

30-day change

+0.01 pp

From 0.50% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.51%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Apache1 product
  • wicket≥ 8.0.0, < 8.19.0 | ≥ 9.0.0, < 9.24.0 | ≥ 10.0.0, < 10.11.0
Apache software foundation1 product
  • apache wicket≥ 8.0.0, ≤ 8.18.0 | ≥ 9.0.0, ≤ 9.23.0 | ≥ 10.0.0, ≤ 10.10.0

2 vendors · 2 products

References

2 links