{"id":"CVE-2026-35337","summary":"Apache Storm Client: RCE through Unsafe Deserialization via Kerberos TGT Credential Handling","details":"Deserialization of Untrusted Data vulnerability in Apache Storm.\n\nVersions Affected:\nbefore 2.8.6.\n\n\nDescription:\nWhen 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.\n\n\nMitigation:\n2.x users should upgrade to 2.8.6.\n\n\nUsers 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.\n\nCredit: This issue was discovered by K.","aliases":["GHSA-jf89-3q6q-vcgr"],"modified":"2026-07-08T08:13:04.152822905Z","published":"2026-04-13T09:11:06.193Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/35xxx/CVE-2026-35337.json","unresolved_ranges":[{"extracted_events":[{"fixed":"2.8.6"}],"source":"AFFECTED_FIELD"},{"extracted_events":[{"fixed":"2.8.6"}],"source":"DESCRIPTION"}],"cna_assigner":"apache","cwe_ids":["CWE-502"]},"references":[{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2026/04/12/6"},{"type":"WEB","url":"https://repo.maven.apache.org/maven2/"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/35xxx/CVE-2026-35337.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-35337"},{"type":"ADVISORY","url":"https://storm.apache.org/2026/04/12/storm286-released.html"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/apache/storm","events":[{"introduced":"2ba95bbd1c911d4fc6363b1c4b9c4c6d86ac9aae"},{"fixed":"1d21736ccc9a11506214214b4d43efe83843b3e0"}],"database_specific":{"extracted_events":[{"introduced":"2.0.0"},{"fixed":"2.8.6"}],"source":"CPE_RANGE","cpe":"cpe:2.3:a:apache:storm:*:*:*:*:*:*:*:*"}}],"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"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}