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9.8
CVE-2026-41635EXPLOITEDPATCHED
apache software foundation · apache mina

Apache MINA: AbstractIoBuffer.resolveClass() null-clazz Branch Skips acceptMatchers Filter — Full Object Deserialization RCE

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 2.0.0 <= 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.

Affected Products

VendorProductVersions
apache software foundationapache mina2.2.0, 2.1.0, 2.0.0

References

  • https://lists.apache.org/thread/1l91w1mqsb3lwfd504fs045ylxntt2tm(vendor-advisory)

Related News (2 articles)

Tier C
oss-security6h ago
ZDRES-059: CVE-2026-41635: Apache MINA: AbstractIoBuffer.resolveClass() null-clazz Branch Skips acceptMatchers Filter — Full Object Deserialization RCE
→ No new info (linked only)
Tier C
VulDB12h ago
CVE-2026-41635 | Apache MINA up to 2.0.27/2.1.10/2.2.5 acceptMatchers Filter AbstractIoBuffer.resolveClass deserialization
→ No new info (linked only)
CVSS 3.19.8 CRITICAL
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA KEV❌ No
Actively exploited✅ Yes
Patch available
https://lists.apache.org/thread/1l91w1mqsb3lwfd504fs045ylxntt2tm
CWECWE-502
PublishedApr 27, 2026
Last enriched6h agov3
Tags
CVE-2026-41635
Trending Score74
Source articles2
Independent2
Info Completeness10/14
Missing: epss, kev, iocs, mitre_attack

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CRITICALCVE-2026-40453
Apache Camel JMS, Apache Camel CoAP, Apache Camel Google PubSub: Incomplete fix for CVE-2025-27636 in non-HTTP HeaderFilterStrategies (camel-jms, camel-sjms, camel-coap, camel-google-pubsub) allows case-variant header injection
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Verification

State: unverified
Confidence: 0%

Vulnerability Timeline

CVE Published
Apr 27, 2026
Discovered by ZDM
Apr 27, 2026
Updated: description, activelyExploited
Apr 27, 2026
Updated: affectedVersions, severity, exploitAvailable, tags
Apr 27, 2026
Actively Exploited
Apr 27, 2026
Exploit Available
Apr 27, 2026
Patch Available
Apr 27, 2026

Version History

v3
Last enriched 6h ago
v3Tier C6h ago

Updated affected versions, changed severity to HIGH, marked exploit as available, and added CVE tag.

affectedVersionsseverityexploitAvailabletags
via oss-security
v2Tier C11h ago

Updated description with new details about the vulnerability and changed exploit availability to false.

descriptionactivelyExploited
via VulDB
v112h ago

Initial creation