Bug 2463177 (CVE-2026-41635)

Summary:	CVE-2026-41635 Apache MINA: Apache MINA: Arbitrary code execution via classname allowlist bypass
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	aschwart, asoldano, aszczucz, ataylor, bbaranow, bmaxwell, boliveir, bstansbe, chfoley, dbruscin, dhanak, dlofthou, drichtar, drosa, fmariani, gmalinko, ibek, istudens, ivassile, iweiss, janstey, jrokos, jwon, kvanderr, mcarlett, mnovotny, mosmerov, mposolda, msvehla, nwallace, pberan, pdelbell, pesilva, pjindal, pmackay, rgodfrey, rhel-process-autobot, rmartinc, rstancel, rstepani, sausingh, smaestri, ssilvert, sthorger, swoodman, tcunning, thjenkin, vdosoudi, vmuzikar, watson-tool-maintainers, yfang
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	A flaw was found in Apache MINA. A remote attacker could exploit a vulnerability in the `AbstractIoBuffer.resolveClass()` method, which failed to properly validate class names for static classes or primitive types. This bypasses the intended security control, known as a classname allowlist, allowing an attacker to execute arbitrary code on systems running applications that use Apache MINA and call `IoBuffer.getObject()`. This could lead to a complete compromise of the affected system.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2463218
Bug Blocks:

Description OSIDB Bzimport 2026-04-27 10:01:52 UTC

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 <= 2.0.27, 2.1.0 <= 2.1.10, and


2.2.0 <= 2.2.5.





The problem is resolved in Apache MINA 2.0.28, 2.1.11, and 2.2.6 by 
applying the classname allowlist earlier.





Affected are applications using Apache MINA that call  IoBuffer.getObject().





Applications using Apache MINA are advised to upgrade.

Comment 3 errata-xmlrpc 2026-05-14 16:56:10 UTC

This issue has been addressed in the following products:

  Red Hat build of Apache Camel 4.18.1 for Spring Boot 3.5.14

Via RHSA-2026:17668 https://access.redhat.com/errata/RHSA-2026:17668