{"id":"UBUNTU-CVE-2026-41635","details":"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 \u003c= 2.0.27, 2.1.0 \u003c= 2.1.10, and 2.2.0 \u003c= 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.","modified":"2026-05-20T16:12:58.979054787Z","published":"2026-04-27T09:16:00Z","upstream":["CVE-2026-41635"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-41635"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-41635"},{"type":"REPORT","url":"https://lists.apache.org/thread/1l91w1mqsb3lwfd504fs045ylxntt2tm"}],"affected":[{"package":{"name":"mina","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/mina?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.1.7.dfsg-11"],"ecosystem_specific":{"binaries":[{"binary_version":"1.1.7.dfsg-11","binary_name":"libmina-java"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-41635.json"}},{"package":{"name":"mina2","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/mina2?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0.7+dfsg-2","2.0.9-1","2.0.9-2"],"ecosystem_specific":{"binaries":[{"binary_version":"2.0.9-2","binary_name":"libmina2-java"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-41635.json"}},{"package":{"name":"mina","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/mina?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.1.7.dfsg-11","1.1.7.dfsg-12"],"ecosystem_specific":{"binaries":[{"binary_version":"1.1.7.dfsg-12","binary_name":"libmina-java"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-41635.json"}},{"package":{"name":"mina2","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/mina2?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0.16-2"],"ecosystem_specific":{"binaries":[{"binary_version":"2.0.16-2","binary_name":"libmina2-java"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-41635.json"}},{"package":{"name":"mina","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/mina?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.1.7.dfsg-13"],"ecosystem_specific":{"binaries":[{"binary_version":"1.1.7.dfsg-13","binary_name":"libmina-java"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-41635.json"}},{"package":{"name":"mina2","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/mina2?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0.19-2"],"ecosystem_specific":{"binaries":[{"binary_version":"2.0.19-2","binary_name":"libmina2-java"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-41635.json"}},{"package":{"name":"mina","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/mina?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.1.7.dfsg-13"],"ecosystem_specific":{"binaries":[{"binary_version":"1.1.7.dfsg-13","binary_name":"libmina-java"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-41635.json"}},{"package":{"name":"mina2","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/mina2?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.1.4-2","2.1.5-1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.1.5-1","binary_name":"libmina2-java"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-41635.json"}},{"package":{"name":"mina","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/mina?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.1.7.dfsg-13","1.1.7.dfsg-13ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.1.7.dfsg-13ubuntu1","binary_name":"libmina-java"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-41635.json"}},{"package":{"name":"mina2","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/mina2?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.2.1-3"],"ecosystem_specific":{"binaries":[{"binary_version":"2.2.1-3","binary_name":"libmina2-java"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-41635.json"}},{"package":{"name":"mina2","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/mina2?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"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