GHSA-jqpw-qww5-cj4c

Suggest an improvement
Source
https://github.com/advisories/GHSA-jqpw-qww5-cj4c
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-jqpw-qww5-cj4c/GHSA-jqpw-qww5-cj4c.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-jqpw-qww5-cj4c
Aliases
Downstream
Published
2026-06-16T23:01:51Z
Modified
2026-07-20T13:45:32Z
Severity
  • 5.9 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • 6.3 (Medium) CVSS_V4 - 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 CVSS Calculator
Summary
n8n: Denial of Service via ZIP decompression in webhook workflow
Details

Impact

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.

Patches

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).

Workarounds

If upgrading is not immediately possible, administrators should consider the following temporary mitigations:

  • 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.

These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.

Database specific 
{
    "cwe_ids":  [
        "CWE-409"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-06-16T23:01:51Z",
    "nvd_published_at":  "2026-06-23T16:17:02Z",
    "severity":  "MODERATE"
}
References

Affected packages

npm / n8n

Package

Name
n8n
View open source insights on deps.dev
Purl
pkg:npm/n8n

Affected ranges

Type
SEMVER
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.24.0

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-jqpw-qww5-cj4c/GHSA-jqpw-qww5-cj4c.json"