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VulnerabilityPublished Updated

CVE-2026-40010: Posssible session fixation attack in Apache Wicket.

Affects Apache WicketSource CVE Database V5

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Not known to be exploited · CVSS 9.1 Critical · fixed in 10.9.0 : patch Apache Wicket as a priority.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 3.1 base score
9.1Critical
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.3% chance of exploitation in 30 days – higher than 31% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 10.9.0
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 6 May 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
Apache Software FoundationApache WicketAffected
  • >=10.0.0 <=10.8.0
  • >=8.0.0 <=8.17.0
  • >=9.0.0 <=9.22.0
Fixed in–
Mavenorg.apache.wicket/wicket-corepkg:maven/org.apache.wicket/wicket-coreOther threatsAffected
  • =8.0.0
  • <=8.17.0
  • =9.0.0
  • =10.0.0
  • <=10.8.0
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Users should upgrade Apache Wicket to version 10.9.0 or later, where the issue is fixed by proper invocation of the changeSessionId method after session binding. No other mitigation or temporary workaround is indicated. Patch status is confirmed by the vendor advisory recommending upgrade to 10.9.0.

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.

References

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