CVE-2026-35337
Description
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.
How to fix
- apache storm2.8.6 or later
- org.apache.storm:storm-client2.8.6 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| apache storm | 2.0.0 ≤ v < 2.8.6 | 2.8.6 |
| org.apache.storm:storm-clientMaven | v < 2.8.6 | 2.8.6 |
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