GHSA-jqpw-qww5-cj4c: n8n: Denial of Service via ZIP decompression in webhook workflow
Summary
A vulnerability in n8n's Compression node allows unauthenticated attackers to crash the entire application by sending specially crafted compressed files to public webhooks. The node decompresses archives without limiting memory usage, causing the process to run out of memory and stop working for all users on that server.
Solution / Mitigation
The issue has been fixed in n8n version 2.24.0. Users should upgrade to this version or later. 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 can temporarily disable the Compression node by adding `n8n-nodes-base.compression` to the `NODES_EXCLUDE` environment variable, or restrict public webhook workflows that accept archive file uploads to authenticated endpoints only.
Vulnerability Details
EPSS: 0.0%
Yes
June 16, 2026
Classification
Affected Vendors
Affected Packages
Related Issues
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Original source: https://github.com/advisories/GHSA-jqpw-qww5-cj4c
First tracked: June 16, 2026 at 08:00 PM
Classified by LLM (prompt v3) · confidence: 92%