Apache MINA: Apache MINA: Arbitrary code execution via classname allowlist bypass

A flaw was found in Apache MINA. A remote attacker could exploit a vulnerability in the AbstractIoBuffer.resolveClass method, which failed to properly validate class names for static classes or primitive types. This bypasses the intended security control, known as a classname allowlist, allowing ...

Unsafe Deserialization

Apache MINA is vulnerable to Unsafe Deserialization. The vulnerability is due to incomplete enforcement of a classname allowlist in AbstractIoBuffer.resolveClass, where certain branches e.g., for primitive or static classes bypass validation and call Class.forName without checks, allowing attacke...

CVE-2026-41409

A flaw was found in Apache MINA. An incomplete fix for a deserialization vulnerability in the AbstractIoBuffer.getObject method allowed a static initializer in a class to be executed before the classname allowlist was applied. This could enable a remote attacker to execute arbitrary code by sendi...

CVE-2026-42779

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...