CVE-2026-42778

CRITICAL

Apache MINA: CWE-502 Deserialization of Untrusted Data (take 2)

Title source: cna
STIX 2.1

Exploitation Summary

EIP tracks 2 public exploits for CVE-2026-42778. PoCs published by adminlove520, Akinfue.

AI-analyzed exploit summary The repository only contains a LICENSE file with no exploit code, technical details, or proof-of-concept. It is a placeholder without any functional content related to CVE-2026-42778.

Description

The fix for CVE-2026-41409 was not applied to the 2.1.X and 2.2.X branches. Here was the original issue description: The fix for CVE-2024-52046 in Apache MINA AbstractIoBuffer.getObject() was incomplete. The classname allowlist of classes allowed to be deserialized 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 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 The fix for CVE-2024-52046 in Apache MINA AbstractIoBuffer.getObject() was incomplete. The classname allowlist of classes allowed to be deserialized 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 <= 2.1.110, 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

Exploits (2)

github STUB 4 stars
by adminlove520 · pythonpoc
https://github.com/adminlove520/CVE-Poc_All_in_One/tree/main/2026/CVE-2026-42778

The repository only contains a LICENSE file with no exploit code, technical details, or proof-of-concept. It is a placeholder without any functional content related to CVE-2026-42778.

Classification
Stub 100%
Attack Type
N/a
Complexity
N/a
Reliability
N/a
Target: N/A
No auth needed
devstral-2 · analyzed May 25, 2026 Full analysis →
nomisec SUSPICIOUS
by Akinfue · poc
https://github.com/Akinfue/CVE-2026-42778-POC

The repository claims to provide an exploit for CVE-2026-42778, a deserialization vulnerability in Apache MINA, but only includes a README with vague details and external download links. No actual exploit code is present, and the focus is on directing users to external sources.

Classification
Suspicious 95%
Attack Type
Deserialization
Complexity
Theoretical
Reliability
Theoretical
Target: Apache MINA 2.1.0-2.1.11, 2.2.0-2.2.6
No auth needed
Prerequisites: network access to a service using IoBuffer.getObject()
devstral-2 · analyzed May 04, 2026 Full analysis →

References (1)

Core 1
Core References

Scores

CVSS v3 9.8
EPSS 0.0068
EPSS Percentile 47.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact total

Details

CWE
CWE-502
Status published
Products (5)
apache/mina 2.1.0 - 2.1.12
Apache Software Foundation/Apache MINA 2.1.X - 2.1.11
Apache Software Foundation/Apache MINA 2.2.X - 2.2.6
org.apache.mina/mina-core 2.1.0 - 2.1.12Maven
org.apache.mina/mina-core 2.2.0 - 2.2.7Maven
Published May 01, 2026
Tracked Since May 01, 2026