Arbitrary Code Execution Vulnerability in Apache MINA by Apache
CVE-2026-42779

9.8CRITICAL

Key Information:

Vendor

Apache
Status
Apache Mina
Vendor
CVE Published:
1 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-42779?

A vulnerability exists in Apache MINA's AbstractIoBuffer.resolveClass() method, where the check for allowed class names has not been properly enforced in specific version branches. This oversight permits arbitrary code execution when certain applications call IoBuffer.getObject(), making it critical for users of Apache MINA versions 2.1.0 to 2.1.11 and 2.2.0 to 2.2.6 to upgrade to the fixed versions 2.1.12 and 2.2.7. Failure to apply the recommended patches could expose applications to significant security risks.

Affected Version(s)

Apache MINA 2.2.X <= 2.2.6

Apache MINA 2.1.X <= 2.1.11

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-42779
Created by dinosn

References

https://lists.apache.org/thread/fhlx5k91hrkgyzh7yk1nghrn3...
vendor-advisory

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Venkatraman Kumar, Securin
.