CVE-2026-84231: Improper neutralization of input during web page generation in Apache Wicket. org.apache.wicket.markup.html.l

Routine

HIGH 7.4WATCHLIST

CVE-2026-84231 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.markup.html.link.ExternalLink builds a JavaScript click handler and writes it into the tag's onclick attribute whenever the markup tag the component is bound to is not an a, link or area element. The URL held in the component's model is concatenated into a single-quoted JavaScript string literal in that handler without being escaped for that context.

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-2026-84231 2026-11-01
VulDB Recent Entries: CVE-2026-84231 | Apache Wicket up to 8.19.0 ExternalLink 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-2026-84231?

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

Is CVE-2026-84231 being exploited?

CVE-2026-84231 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-2026-84231 affect?

CVE-2026-84231 affects affected software. Severity is high (CVSS 7.4). Improper neutralization of input during web page generation in Apache Wicket. org.apache.wicket.markup.html.link.ExternalLink builds a JavaScript click handler and writes it into the tag's onclick attribute whenever the markup tag the comp

How urgent is CVE-2026-84231?

Priority 31/100. High severity; On your watchlist

References

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