Apache MINA vulnerabilities

The JavaNativeMessageDecoder class in the Apache MINA 3.0 codec module calls ObjectInputStream.readObject() on frame bytes without any class filter. An application that places it in front of an untrusted peer is exposed to gadget-chain remote code execution. The 3.0.0 branch is inactive and no fix will be released for it.

The fix for CVE-2026-47065/ZDRES-232 ("resolveProxyClass Not Overridden - acceptMatchers Filter Bypass via java.lang.reflect.Proxy"), released on 2026-06-02 and announced as "Fully addressed" in MINA 2.2.8, 2.1.13 and 2.0.29, was committed to the 2.2.X branch only. The 2.0.X and 2.1.X maintenance branches never received the resolveProxyClass() override, so the 2.0.29 and 2.1.13 artifacts listed as fixed -- and every later release on those lines, up to and including the current 2.0.30 and 2.1.14 -- remain vulnerable to the exact allow-list bypass that CVE-2026-47065 was meant to close.

Apache MINA versions 2.1.0 to 2.1.11 and 2.2.0 to 2.2.6 are vulnerable to arbitrary code execution due to a lack of class verification in the AbstractIoBuffer.resolveClass() method. The fix was introduced in versions 2.1.12 and 2.2.7.

The fix for CVE-2024-52046 in Apache MINA AbstractIoBuffer.getObject() was incomplete and was not applied to the 2.1.X and 2.2.X branches. The classname allowlist was applied too late, after a static initializer in a class to be read might already have been executed. Affected versions are Apache MINA 2.1.0–2.1.11 and 2.2.0–2.2.6; the issue is resolved in 2.1.12 and 2.2.7.

The CompressionFilter class in Apache MINA uses ZLib to deflate and inflate data, but does not control the resulting buffer size during decompression. Maliciously compressed data with a very high compression ratio can exhaust application memory. The fix introduces limits on the maximum decompressed size and compression ratio.

CVE-2023-35887 vulnerability in Apache MINA exposes sensitive information to unauthorized actors. Logged users on SFTP servers may discover 'exists/does not exist' information about items outside the rooted tree using parent navigation or symlinks.