CVE-2026-82435: Description The worker's Netty message decoder is installed ahead of the SASL authentication handlers in the pipeline a
Summary
A vulnerability in Apache Storm's Netty message decoder allows an unauthenticated attacker with network access to a worker port to cause large memory allocations before authentication is checked. The decoder processes incoming frames before SASL authentication handlers (a protocol that verifies user identity) run, and since authentication is disabled by default, an attacker only needs TCP connectivity to trigger the issue.
Solution / Mitigation
Upgrade to version 3.1.0, where frames are decoded only after the handshake completes. For users unable to upgrade immediately, restrict worker slot port access to within the cluster only and enable `storm.messaging.netty.authentication` if your deployment allows it.
Vulnerability Details
EPSS: 0.0%
September 14, 2026
Classification
Taxonomy References
Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-82435
First tracked: September 14, 2026 at 02:11 PM
Classified by LLM (prompt v3) · confidence: 95%