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.
Fix
Patch, vendor advisory and mitigation references on NVD 1
- https://storm.apache.org/2026/04/12/storm286-released.html Release Notes, Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 8.8 · apacheNVD modified 2026-10-26 22:10
Affected (CPE criteria) 1
cpe:2.3:a:apache:storm:*:*:*:*:*:*:*:*
References 2
- https://storm.apache.org/2026/04/12/storm286-released.html Release Notes, Vendor Advisory
- http://www.openwall.com/lists/oss-security/2026/04/12/6 Mailing List, Third Party Advisory