CVE-2026-40010: wicket Session Fixation — Fix

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.

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CVSS v3.1 Score

9.1

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

EPSS — Exploit Prediction

0.0011

Probability of exploitation

0.29%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-384 CWE-384

Affected Products

Vendor	Product	Versions
apache	wicket	8.0.0 — 8.17.0
apache	wicket	9.0.0 — 9.22.0
apache	wicket	10.0.0 — 10.9.0

References

Advisories & Patches

https://lists.apache.org/thread/61wsc0xdtfd5oozojfx7by9w3jwgkmv1

Other References

http://www.openwall.com/lists/oss-security/2026/05/06/1

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. It has a CVSS v3.1 base score of 9.1 (CRITICAL).

How severe is CVE-2026-40010? +

CVE-2026-40010 has a CVSS v3.1 score of 9.1 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately. The EPSS score is 0.0011, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-40010? +

CVE-2026-40010 affects products from apache, specifically: wicket. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-40010? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2026-40010