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CVE-2026-54156 is a denial-of-service vulnerability in node-opcua caused by an unbounded global nonce cache. An unauthenticated remote attacker can repeatedly initiate OPC UA session establishment, causing nonces to accumulate without sufficient eviction or expiration. This results in uncontrolled heap memory growth in the server process. The vulnerable condition is associated with session-opening activity and insufficient resource-limiting logic for cached nonce values, allowing repeated network requests to consume memory until the process becomes unstable or crashes.
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No public exploit code observed for this vulnerability.
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No public activity observed for this vulnerability.
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Cross-references every affected SKU, including bundled OEM variants.
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