CVE-2026-54314

n8n: Denial of Service via ZIP decompression in webhook workflow

State: Published
Severity: 6.3 Medium
Published: Jun 23, 2026
Updated: Jun 24, 2026
Reserved: Jun 12, 2026

Description

n8n is an open source workflow automation platform. Prior to 2.24.0, 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. This vulnerability is fixed in 2.24.0.

Scores

CVSS	Score	Vector	Source
4.0	6.3 Medium	CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N	GitHub_M

Weaknesses

CWE-409 Improper Handling of Highly Compressed Data (Data Amplification)

Affected Products

Product	Versions
n8nn8n-io	< 2.24.0Affected

References

https://github.com/n8n-io/n8n/security/advisories/GHSA-jqpw-qww5-cj4c

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