What is CVE-2026-41635?

CVE-2026-41635 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-2026-41635?

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

Deserialization in Apache Mina

CVE-2026-41635

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…

Vulnerability class: Insecure Deserialization

EPSS: 0.001 (18.8th 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)
af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2026-41635?: CVE-2026-41635 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-2026-41635?: Critical severity. CVSS v3 base score is 9.8 out of 10.