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VulnerabilityPublished Updated

CVE-2026-41635: Org.apache.mina:mina core: Apache MINA vulnerable to Deserialization of Untrusted Data

Affects org.apache.mina:mina-coreSource GCVE Database

0
Authoritative record:CVE-2026-41635· Critical 9.8

Not known to be exploited · CVSS 9.8 Critical : upgrade to 2.0.28 as a priority.

Data as of 27 Oct 2026, 00:07 UTC

CVSS 3.1 base score
9.8Critical
How severe the flaw is on the 0–10 CVSS scale.
Patch
Available – fixed in 2.0.28, 2.1.11, 2.2.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 27 Apr 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Upgrade org.apache.mina:mina-core to 2.0.28; org.apache.mina:mina-core to 2.1.11; org.apache.mina:mina-core to 2.2.6.

Affected software

ProductAffectedFixed in
Mavenorg.apache.mina:mina-coreAffected
  • >=2.0.0 <2.0.28
Fixed in
  • 2.0.28
Mavenorg.apache.mina:mina-coreAffected
  • >=2.1.0 <2.1.11
Fixed in
  • 2.1.11
Mavenorg.apache.mina:mina-coreAffected
  • >=2.2.0 <2.2.6
Fixed in
  • 2.2.6

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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.

References

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