Vulnerability Details CVE-2026-35337
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.004
EPSS Ranking 61.7%
CVSS Severity
CVSS v3 Score 8.8
References
Products affected by CVE-2026-35337
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cpe:2.3:a:apache:storm:2.0.0
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cpe:2.3:a:apache:storm:2.1.0
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cpe:2.3:a:apache:storm:2.1.1
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cpe:2.3:a:apache:storm:2.2.0
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cpe:2.3:a:apache:storm:2.2.1
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cpe:2.3:a:apache:storm:2.3.0
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cpe:2.3:a:apache:storm:2.4.0
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cpe:2.3:a:apache:storm:2.5.0
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cpe:2.3:a:apache:storm:2.6.0
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cpe:2.3:a:apache:storm:2.6.1
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cpe:2.3:a:apache:storm:2.6.2
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cpe:2.3:a:apache:storm:2.6.3
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cpe:2.3:a:apache:storm:2.6.4
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cpe:2.3:a:apache:storm:2.7.0
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cpe:2.3:a:apache:storm:2.7.1
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cpe:2.3:a:apache:storm:2.8.0
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cpe:2.3:a:apache:storm:2.8.1
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cpe:2.3:a:apache:storm:2.8.2
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cpe:2.3:a:apache:storm:2.8.3
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cpe:2.3:a:apache:storm:2.8.4
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cpe:2.3:a:apache:storm:2.8.5