Bug 2464322 (CVE-2026-42779) - CVE-2026-42779 Apache MINA: Apache MINA: Arbitrary Code Execution via Classname Allowlist Bypass
Summary: CVE-2026-42779 Apache MINA: Apache MINA: Arbitrary Code Execution via Classna...
Keywords:
Status: NEW
Alias: CVE-2026-42779
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2477393
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-05-01 11:01 UTC by OSIDB Bzimport
Modified: 2026-05-14 07:50 UTC (History)
51 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-05-01 11:01:20 UTC 
The fix for CVE-2026-41635 was not applied to the 2.1.X and 2.2.X branches. Here was the original issue description:











Apache MINA's AbstractIoBuffer.resolveClass() contains two branches, one of them (for static classes or primitive types) does not check the class at all, bypassing the classname allowlist and allowing arbitrary code to be executed.




The fix checks if the class is present in the accepted class filter before calling Class.forName(). 






Affected versions are Apache MINA 2.1.0 <= 2.1.11, and 2.2.0 <= 2.2.6.





The problem is resolved in Apache MINA 2.1.12, and 2.2.7 by 
applying the classname allowlist earlier.





Affected are applications using Apache MINA that call  IoBuffer.getObject().





Applications using Apache MINA are advised to upgrade.
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