CVE-2026-54314Medium· 5.9▾ Sunlitn8n: Denial of Service via ZIP decompression in webhook workflow
▾ Sunlit zone — Low / medium · no exploitation signal
impact 32.5 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Jul 4.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via GHSA
0.4%
0.4% → 0.5%
The Compression node's Decompress operation expanded attacker-controlled archives into memory without enforcing limits on decompressed output size. An unauthenticated attacker could send a small compressed archive to a public webhook workflow using this node, causing the n8n process to terminate due to memory exhaustion and disrupting all workflows in the same instance.
The issue has been fixed in n8n version 2.24.0. Users should upgrade to this version or later to remediate the vulnerability. The fix introduces configurable limits on decompressed output size (N8N_COMPRESSION_NODE_MAX_DECOMPRESSED_SIZE_BYTES) and ZIP entry count (N8N_COMPRESSION_NODE_MAX_ZIP_ENTRIES).
If upgrading is not immediately possible, administrators should consider the following temporary mitigations:
n8n-nodes-base.compression to the NODES_EXCLUDE environment variable.These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.
n8n < 2.24.0Upgrade to a patched release:
n8n 2.24.0Connected by shared product, vendor, weakness, or advisory.
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