CVE-2026-42779

critical · 9.8

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.

9.8

CVSS

0.9%

EPSS (exploit prob.)

58th

EPSS percentile

2026-05-01

Published

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CWE-502

Affected products

Vendor	Product	Affected versions
apache	mina	>= 2.1.0, < 2.1.12
apache	mina	>= 2.2.0, < 2.2.7

Check a specific version with /api/v1/cve/match.

References

https://lists.apache.org/thread/fhlx5k91hrkgyzh7yk1nghrn3k27gxy0

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-42779