Is CVE-2026-35337 actively exploited?

No active exploitation of CVE-2026-35337 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-35337 be exploited remotely?

Yes. CVE-2026-35337 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-35337?

CVE-2026-35337 has a CVSS score of 8.8 (HIGH).

HOME VULNERABILITIESCVE-2026-35337

HIGH

CVE-2026-35337

CWE-502Published: April 13, 2026· Updated: Apr 15, 2026

8.8

CVSS v3.1

EPSS:0.42%probability of exploitation in 30 daysPercentile:61.7th

Official 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.

NVD Source

Technical Analysis

CVE-2026-35337 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.

From a weakness classification perspective (CWE-502): Insecure deserialization vulnerabilities allow attackers to inject malicious objects during deserialization, potentially enabling remote code execution.