CVE-2026-54314

Name of the Vulnerable Software and Affected Versions n8n versions prior to 2.24.0

Description The Compression node's Decompress operation expands attacker-controlled archives into memory without enforcing limits on the decompressed output size. An unauthenticated attacker can send a small compressed archive to a public webhook workflow utilizing this node, leading to memory exhaustion. This causes the n8n process to terminate, which disrupts all workflows running within the same instance.

Recommendations Update to version 2.24.0 or later. As a temporary workaround, disable the Compression node by adding n8n-nodes-base.compression to the NODES EXCLUDE environment variable. Restrict public webhook workflows that accept archive file uploads to authenticated endpoints only.