CVE-2026-54314: n8n Denial of Service Vulnerability

MODERATE
Advisory Identifier: GHSA-jqpw-qww5-cj4c
Share
CVSS 5.9
CWE-409
Published
Advisory Summary

CVE-2026-54314 is a MODERATE (CVSS 5.9) denial of service vulnerability (CWE-409: Improper Handling of Highly Compressed Data (Data Amplification)) affecting n8n libraries in the npm ecosystem. The issue involves denial of service via zip decompression in webhook workflow. Remediation is available by upgrading affected packages to version 2.24.0.

CVE-2026-54314 at a Glance

CVE Identifier CVE-2026-54314
GHSA Identifier GHSA-jqpw-qww5-cj4c
Severity MODERATE
CVSS v3.1 Base Score 5.9
CWE Classification CWE-409: Improper Handling of Highly Compressed Data (Data Amplification)
Affected Product n8n
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 5.9

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H).

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2026-54314

To remediate this vulnerability, upgrade all affected n8n dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

n8n fixed: 2.24.0 
npm install n8n@2.24.0
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

npm ls n8n

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2026-54314, inspect your project dependencies using npm:

npm ls n8n

Analyze the terminal output to locate any version of n8n in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.24.0), your application is affected.

Note: The npm ls n8n command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-409: Improper Handling of Highly Compressed Data (Data Amplification), where the product does not handle or incorrectly handles a compressed input with a very high compression ratio that produces a large output. In n8n, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

## 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.

CVE-2026-54314 Affected n8n Versions

1 component(s)
Fixed Versions:
2.24.0
Product / Package Ecosystem Affected Versions Fixed Version
n8n
npm/n8n
npm
< 2.24.0
2.24.0

References

GitHub Advisory / Wiki ADVISORY
https://github.com/n8n-io/n8n/security/advisories/GHSA-jqpw-qww5-cj4c
NVD — CVE-2026-54314 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-54314
n8n Source Repository REPOSITORY
https://github.com/n8n-io/n8n

Frequently Asked Questions

What is CVE-2026-54314?
CVE-2026-54314 is a security vulnerability in n8n involving Denial of Service via ZIP decompression in webhook workflow under CWE-409: Improper Handling of Highly Compressed Data (Data Amplification).
Which n8n versions are affected?
Affected versions include releases prior to 2.24.0 across affected packages: n8n.
What version fixes CVE-2026-54314?
Upgrading to 2.24.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is n8n affected?
Yes, n8n is affected in releases prior to 2.24.0. Upgrade your dependency to 2.24.0 or later.
What is the CVSS score of CVE-2026-54314?
CVE-2026-54314 has a CVSS v3.1 base score of 5.9 (MODERATE) with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2026-54314?
CVE-2026-54314 is classified under CWE-409: Improper Handling of Highly Compressed Data (Data Amplification) (The product does not handle or incorrectly handles a compressed input with a very high compression ratio that produces a large output.).
How can I check npm dependencies for CVE-2026-54314?
Run the dependency tree command: 'npm ls n8n'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-jqpw-qww5-cj4c",
  "modified" : "2026-07-20T13:39:57Z",
  "published" : "2026-06-16T23:01:51Z",
  "aliases" : [ "CVE-2026-54314" ],
  "summary" : "n8n: Denial of Service via ZIP decompression in webhook workflow",
  "details" : "## Impact\nThe 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. \n\n## Patches\nThe 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`).\n\n## Workarounds\nIf upgrading is not immediately possible, administrators should consider the following temporary mitigations:\n- Disable the Compression node by adding `n8n-nodes-base.compression` to the `NODES_EXCLUDE` environment variable.\n- Restrict public webhook workflows that accept archive file uploads to authenticated endpoints only.\n\nThese workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"
  }, {
    "type" : "CVSS_V4",
    "score" : "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"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "n8n"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.24.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/n8n-io/n8n/security/advisories/GHSA-jqpw-qww5-cj4c"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-54314"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/n8n-io/n8n"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-409" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-06-16T23:01:51Z",
    "nvd_published_at" : "2026-06-23T16:17:02Z"
  }
}