Vulnerability-Lookup

UBUNTU-CVE-2026-41635 (CVE-2026-41635)

Vulnerability from osv_ubuntu – Published: 2026-04-27 09:16 – Updated: 2026-06-23 15:56 – Source website

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 <= 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.

Severity

9.8 (Critical)


                    
                      CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-41635	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-41635	REPORT
	https://lists.apache.org/thread/1l91w1mqsb3lwfd50…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libmina-java",
            "binary_version": "1.1.7.dfsg-11"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "mina",
        "purl": "pkg:deb/ubuntu/mina@1.1.7.dfsg-11?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.1.7.dfsg-11"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libmina2-java",
            "binary_version": "2.0.9-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "mina2",
        "purl": "pkg:deb/ubuntu/mina2@2.0.9-2?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.0.7+dfsg-2",
        "2.0.9-1",
        "2.0.9-2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libmina-java",
            "binary_version": "1.1.7.dfsg-12"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "mina",
        "purl": "pkg:deb/ubuntu/mina@1.1.7.dfsg-12?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.1.7.dfsg-11",
        "1.1.7.dfsg-12"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libmina2-java",
            "binary_version": "2.0.16-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "mina2",
        "purl": "pkg:deb/ubuntu/mina2@2.0.16-2?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.0.16-2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libmina-java",
            "binary_version": "1.1.7.dfsg-13"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "mina",
        "purl": "pkg:deb/ubuntu/mina@1.1.7.dfsg-13?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.1.7.dfsg-13"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libmina2-java",
            "binary_version": "2.0.19-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "mina2",
        "purl": "pkg:deb/ubuntu/mina2@2.0.19-2?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.0.19-2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libmina-java",
            "binary_version": "1.1.7.dfsg-13"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "mina",
        "purl": "pkg:deb/ubuntu/mina@1.1.7.dfsg-13?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.1.7.dfsg-13"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libmina2-java",
            "binary_version": "2.1.5-1ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:22.04:LTS",
        "name": "mina2",
        "purl": "pkg:deb/ubuntu/mina2@2.1.5-1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.1.4-2",
        "2.1.5-1",
        "2.1.5-1ubuntu0.1~esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libmina-java",
            "binary_version": "1.1.7.dfsg-13ubuntu1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "mina",
        "purl": "pkg:deb/ubuntu/mina@1.1.7.dfsg-13ubuntu1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.1.7.dfsg-13",
        "1.1.7.dfsg-13ubuntu1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libmina2-java",
            "binary_version": "2.2.1-3ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:24.04:LTS",
        "name": "mina2",
        "purl": "pkg:deb/ubuntu/mina2@2.2.1-3ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.2.1-3",
        "2.2.1-3ubuntu0.1~esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libmina2-java",
            "binary_version": "2.2.1-4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "mina2",
        "purl": "pkg:deb/ubuntu/mina2@2.2.1-4?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.2.1-3",
        "2.2.1-4"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libmina2-java",
            "binary_version": "2.2.1-4ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:26.04:LTS",
        "name": "mina2",
        "purl": "pkg:deb/ubuntu/mina2@2.2.1-4ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.2.1-4",
        "2.2.1-4ubuntu0.1~esm1"
      ]
    }
  ],
  "aliases": [],
  "details": "Apache MINA\u0027s 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\u00a0before calling\u00a0Class.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.",
  "id": "UBUNTU-CVE-2026-41635",
  "modified": "2026-06-23T15:56:26Z",
  "published": "2026-04-27T09:16:00Z",
  "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"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-41635"
  ]
}

CVE-2026-41635 (GCVE-0-2026-41635)

Vulnerability from cvelistv5 – Published: 2026-04-27 08:59 – Updated: 2026-04-28 03:55

Title

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

Summary

Severity

9.8 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-04-27 00:00 UTC

CWE

CWE-502 - Deserialization of Untrusted Data

Assigner

apache mitre root Scorecard

References

2 references

URL	Tags
https://lists.apache.org/thread/1l91w1mqsb3lwfd50…	vendor-advisory
http://www.openwall.com/lists/oss-security/2026/04/27/4

Impacted products

1 product

Vendor	Product	Version
Apache Software Foundation	Apache MINA	Affected: 2.2.0 , ≤ 2.2.5 (semver) Affected: 2.1.0 , ≤ 2.1.10 (semver) Affected: 2.0.0 , ≤ 2.0.27 (semver)

Credits

Venkatraman Kumar, Securin

Show details on NVD website

JSON

To clipboard

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                "id": "CVE-2026-41635",
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                  },
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                "role": "CISA Coordinator",
                "timestamp": "2026-04-27T00:00:00+00:00",
                "version": "2.0.3"
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          "packageName": "org.apache.mina:mina-core",
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          "vendor": "Apache Software Foundation",
          "versions": [
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              "status": "affected",
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      "credits": [
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          "lang": "en",
          "type": "reporter",
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    "assignerShortName": "apache",
    "cveId": "CVE-2026-41635",
    "datePublished": "2026-04-27T08:59:50.652Z",
    "dateReserved": "2026-04-21T22:18:22.755Z",
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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UBUNTU-CVE-2026-41635 (CVE-2026-41635)

CVE-2026-41635 (GCVE-0-2026-41635)

Tags

Sightings

Nomenclature

Related by attack behaviour