---
title: "CVE-2026-41635: Apache MINA vulnerable to Deserialization of Untrusted Data"
url: https://erroneo.us/security/cve/CVE-2026-41635/
description: "CVE-2026-41635 (org.apache.mina:mina-core (Maven)): Apache MINA's AbstractIoBuffer.resolveClass() contains two branches, one of them (for static classes or…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-04-27
date_modified: 2026-05-07
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-41635"
kev: false
cvss: 9.8
epss: 0.00817
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-41635: Apache MINA vulnerable to Deserialization of Untrusted Data

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 0.8% , percentile 57: FIRST’s model estimates a 0.8% chance of exploitation activity in the next 30 days, higher than 57% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes org.apache.mina:mina-core (Maven) >= 2.0.0, < 2.0.28, fixed in 2.0.28 ; org.apache.mina:mina-core (Maven) >= 2.1.0, < 2.1.11, fixed in 2.1.11 ; org.apache.mina:mina-core (Maven) >= 2.2.0, < 2.2.6, fixed in 2.2.6 . Check your lockfile, including transitive dependencies.

## What it is

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 2.0.0

## Affected packages

- Maven `org.apache.mina:mina-core` >= 2.0.0, < 2.0.28 → fixed: 2.0.28
- Maven `org.apache.mina:mina-core` >= 2.1.0, < 2.1.11 → fixed: 2.1.11
- Maven `org.apache.mina:mina-core` >= 2.2.0, < 2.2.6 → fixed: 2.2.6

## Affected products (CVE record)

- Apache Software Foundation Apache MINA: 2.2.0 <= 2.2.5, 2.1.0 <= 2.1.10, 2.0.0 <= 2.0.27

## Severity

- apache CVSS 3.1: 9.8 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`
- GitHub CVSS 3.1: 9.8 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.82% probability of exploitation activity in the next 30 days; percentile 57.

## Sources

- [lists.apache.org](https://lists.apache.org/thread/1l91w1mqsb3lwfd504fs045ylxntt2tm)
- [GitHub Advisory GHSA-8297-v2rf-2p32](https://github.com/advisories/GHSA-8297-v2rf-2p32)
- [CVE.org record CVE-2026-41635](https://www.cve.org/CVERecord?id=CVE-2026-41635)
- [NVD entry CVE-2026-41635](https://nvd.nist.gov/vuln/detail/CVE-2026-41635)
- [openwall.com](http://www.openwall.com/lists/oss-security/2026/04/27/4)

---
Source page: https://erroneo.us/security/cve/CVE-2026-41635/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt