Apache Storm Client: RCE through Unsafe Deserialization via Kerberos TGT Credential Handling

{
  "id": "4d12355e836f95022d6a9316b3e1428d37c35e103448621ddf2765ff9ef41685",
  "url": "https://osv.dev/vulnerability/CVE-2026-35337",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Apache Storm Client: RCE through Unsafe Deserialization via Kerberos TGT Credential Handling",
    "summary": "Deserialization of Untrusted Data vulnerability in Apache Storm. Versions Affected: before 2.8.6. Description: When processing topology credentials submitted via the Nimbus Thrift API, Storm deserializes the base64-encoded TGT blob using ObjectInputStream.readObject() without any class filtering or validation. An authenticated user with topology submission rights could supply a crafted serialized object in the \"TGT\" credential field, leading to remote code execution in both the Nimbus and Worker JVMs. Mitigation: 2.x users should upgrade to 2.8.6. Users who cannot upgrade immediately should monkey-patch an ObjectInputFilter allow-list to ClientAuthUtils.deserializeKerberosTicket() restricting deserialized classes to javax.security.auth.kerberos.KerberosTicket and its known dependencies. A guide on how to do this is available in the release notes of 2.8.6. Credit: This issue was discovered by K.",
    "evidence": "osv:CVE-2026-35337",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-35337",
      "aliases": [
        "CVE-2026-35337",
        "GHSA-jf89-3q6q-vcgr"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/apache/storm",
              "type": "GIT",
              "events": [
                {
                  "introduced": "2ba95bbd1c911d4fc6363b1c4b9c4c6d86ac9aae"
                },
                {
                  "fixed": "1d21736ccc9a11506214214b4d43efe83843b3e0"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:apache:storm:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.0.0"
                      },
                      {
                        "fixed": "2.8.6"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v2.8.5",
            "v2.8.4",
            "v2.8.3",
            "v2.8.2",
            "v2.8.1",
            "v2.8.0",
            "v2.7.1",
            "v2.7.0",
            "v2.6.4",
            "v2.6.3",
            "v2.6.1",
            "v2.5.0",
            "v2.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-35337.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:38.879753353Z",
      "provider": "osv",
      "references": [
        "https://repo.maven.apache.org/maven2/",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/35xxx/CVE-2026-35337.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-35337",
        "https://storm.apache.org/2026/04/12/storm286-released.html"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-502"
        ],
        "cna_assigner": "apache",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "fixed": "2.8.6"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/35xxx/CVE-2026-35337.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-35337",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 506370,
  "published_at": "2026-04-13T09:11:06.193+00:00"
}