CVE-2026-83539: Improper neutralization of input during web page generation in Apache Wicket. org.apache.wicket.extensions.ma

Routine

HIGH 7.4WATCHLIST

CVE-2026-83539 is a high-severity flaw (CVSS 7.4) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Improper neutralization of input during web page generation in Apache Wicket. org.apache.wicket.extensions.markup.html.basic.SmartLinkLabel and org.apache.wicket.extensions.markup.html.basic.SmartLinkMultiLineLabel display a text value and turn any URL they find in it into a hyperlink. Both escape the model value and then hand the escaped text to org.apache.wicket.extensions.markup.html.basic.DefaultLinkParser, which searches it for anything of

Why this priority

High severity
On your watchlist

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.4 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Active
EPSS exploit chance	n/a
CISA exploited list	No
Weakness	CWE-79
Published	2026-11-01
Last modified	2026-11-01

Publisher (CNA): Apache Software Foundation

Last updated 2026-11-01 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Timeline

2026-11-01 23:17 UTCPublished CVE record published
2026-11-01 23:17 UTCUpdated Record last modified

Advisories and coverage

Research and news

Vulners Bulletins: CVE-2026-83539 2026-11-01
VulDB Recent Entries: CVE-2026-83539 | Apache Wicket up to 8.19.0/9.24.0/10.11.0 SmartLinkLabel Strings.java cross site scripting 2026-11-01

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-83539?

No fixed release is listed yet. Watch the vendor advisory and apply any mitigation shown on this page.

Is CVE-2026-83539 being exploited?

CVE-2026-83539 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-83539 affect?

CVE-2026-83539 affects affected software. Severity is high (CVSS 7.4). Improper neutralization of input during web page generation in Apache Wicket. org.apache.wicket.extensions.markup.html.basic.SmartLinkLabel and org.apache.wicket.extensions.markup.html.basic.SmartLinkMultiLineLabel display a text value and

How urgent is CVE-2026-83539?

Priority 31/100. High severity; On your watchlist

References

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