How severe is CVE-2026-40010?

CVE-2026-40010 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2026-40010 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-40010?

CVE-2026-40010 affects Apache Wicket. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-40010?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-40010 have an EU (EUVD) identifier?

Yes. CVE-2026-40010 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-27554.

When was CVE-2026-40010 published?

CVE-2026-40010 was published on 2026-05-06 and last updated on 2026-06-17.

CVE-2026-40010

CVE-2026-40010 is a critical-severity vulnerability in Apache Wicket with a CVSS 3.x base score of 9.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-384.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
EPSS exploit prediction: 1% (48th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-27554
Weakness: CWE-384
Affected product: Apache Wicket
Published: 2026-05-06
Last modified: 2026-06-17

Description

Missing invocation of Servlet http web request method changeSessionId after session binding can be exploited for a session fixation attack in Apache Wicket. This issue affects Apache Wicket: from 8.0.0 through 8.17.0, 9.0.0, from 10.0.0 through 10.8.0. Users are recommended to upgrade to version 10.9.0, which fixes the issue.

Frequently asked questions

What is CVE-2026-40010?: Missing invocation of Servlet http web request method changeSessionId after session binding can be exploited for a session fixation attack in Apache Wicket. This issue affects Apache Wicket: from 8.0.0 through 8.17.0, 9.0.0, from 10.0.0 through 10.8.0. Users are recommended to upgrade to version 10.9.0, which fixes the issue.
How severe is CVE-2026-40010?: CVE-2026-40010 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2026-40010 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-40010?: CVE-2026-40010 affects Apache Wicket. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-40010?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-40010 have an EU (EUVD) identifier?: Yes. CVE-2026-40010 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-27554.
When was CVE-2026-40010 published?: CVE-2026-40010 was published on 2026-05-06 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:apache:wicket:*:*:*:*:*:*:*:*

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