GHSA-pm35-fqvh-cq5g

Suggest an improvement
Source
https://github.com/advisories/GHSA-pm35-fqvh-cq5g
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-pm35-fqvh-cq5g/GHSA-pm35-fqvh-cq5g.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-pm35-fqvh-cq5g
Aliases
Downstream
Published
2026-07-22T22:02:04Z
Modified
2026-07-22T22:26:48Z
Severity
  • 8.9 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:L CVSS Calculator
Summary
n8n: Legacy Expression Evaluator Sanitizer Bypass Leads to Authenticated Code Execution
Details

Impact

The legacy expression evaluator's computed-member sanitizer can be bypassed by an authenticated user with workflow create or modify permissions. Successful exploitation grants the attacker host-level code execution as the n8n process.

The legacy expression engine is the default engine in affected versions.

Patches

The issue has been fixed in n8n versions 1.123.64, 2.29.8, and 2.30.1. Users should upgrade to one of these versions or later to remediate the vulnerability.

Workarounds

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

  • Restrict n8n instance access to fully trusted users only.
  • Switch to the non-legacy expression engine by setting N8N_EXPRESSION_ENGINE=vm.

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

Database specific 
{
    "cwe_ids":  [
        "CWE-917"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-07-22T22:02:04Z",
    "nvd_published_at":  null,
    "severity":  "HIGH"
}
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
1.123.64

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-pm35-fqvh-cq5g/GHSA-pm35-fqvh-cq5g.json"

npm / n8n

Package

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

Affected ranges

Type
SEMVER
Events
Introduced
2.30.0
Fixed
2.30.1

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-pm35-fqvh-cq5g/GHSA-pm35-fqvh-cq5g.json"

npm / n8n

Package

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

Affected ranges

Type
SEMVER
Events
Introduced
2.0.0-rc.0
Fixed
2.29.8

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-pm35-fqvh-cq5g/GHSA-pm35-fqvh-cq5g.json"