CVE-2026-66390: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Apache W

Routine

MEDIUM 6.1WATCHLISTUPGRADE

CVE-2026-66390 is a medium-severity flaw (CVSS 6.1) affecting wicket. 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 ('Cross-site Scripting') vulnerability in Apache Wicket. This issue affects Apache Wicket: from 9.0.0 through 9.23.0, from 10.0.0 through 10.9.0. Users are recommended to upgrade to version 10.10.0, which fixes the issue.

Why this priority

On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.6% (top 53%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-07-27
Last modified	2026-10-24

Publisher (CNA): Apache Software Foundation · Vendor: apache

Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-27 17:16 UTCPublished CVE record published
2026-10-24 13:10 UTCUpdated Record last modified

apache wicket UPGRADE

Affected: >= 9.0.0 and <= 9.23.0 · >= 10.0.0 and < 10.10.0

Fixed in: 10.10.0

Safe to downgrade to: a release before 9.0.0

1. Check installed version

apt-cache policy wicket || rpm -q wicket || wicket --version

2. UPGRADE to 10.10.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade wicket

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade wicket

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 9.0.0 (Debian / Ubuntu)

apt-cache madison wicket sudo apt install wicket=<VERSION_BEFORE_9.0.0> sudo apt-mark hold wicket

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list wicket sudo dnf downgrade wicket-<VERSION_BEFORE_9.0.0> sudo dnf versionlock add wicket

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Exact fixes by distribution

Fedora ELN · ntpd-rs · FIXED · 1.7.2-3.eln159 · FEDORA-2026-57e4a99310 · source

sudo dnf upgrade --advisory=FEDORA-2026-57e4a99310

Fedora 46 · moby-engine · FIXED · 29.9.2-2.fc46 · FEDORA-2026-4856be87b3 · source

sudo dnf upgrade --advisory=FEDORA-2026-4856be87b3

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-2026-66390?

wicket: upgrade to 10.10.0. Exact commands for each OS are on this page.

Is CVE-2026-66390 being exploited?

CVE-2026-66390 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-2026-66390 affect?

CVE-2026-66390 affects wicket. Severity is medium (CVSS 6.1). Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Apache Wicket. This issue affects Apache Wicket: from 9.0.0 through 9.23.0, from 10.0.0 through 10.9.0. Users are recommended to upgrade

How urgent is CVE-2026-66390?

Priority 38/100. On your watchlist

Related CVEs

CVE-2026-66391 MEDIUM 6.5 UPGRADE Use of Insufficiently Random Values, Protection Mechanism Failure vulnerability in Apache Wicket. This issue

References

← Back to latest CVEs