What is CVE-2026-41409?

CVE-2026-41409 is a critical-severity vulnerability in Apache Mina, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2026-04-27.

How severe is CVE-2026-41409?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Deserialization in Apache Mina

CVE-2026-41409

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 b…

Vulnerability class: Insecure Deserialization

EPSS: 0.003 (51.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Apache Mina
Apache Software Foundation Mina — versions 2.2.0, 2.1.0, 2.0.0

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

References

security@apache.org (vendor-advisory, Mailing List, Vendor Advisory)

Frequently asked questions

What is CVE-2026-41409?: CVE-2026-41409 is a critical-severity vulnerability in Apache Mina, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2026-04-27.
How severe is CVE-2026-41409?: Critical severity. CVSS v3 base score is 9.8 out of 10.