GHSA-89gh-3pgc-v5h2

Suggest an improvement
Source
https://github.com/advisories/GHSA-89gh-3pgc-v5h2
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-89gh-3pgc-v5h2/GHSA-89gh-3pgc-v5h2.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-89gh-3pgc-v5h2
Aliases
Downstream
Published
2026-07-22T22:54:01Z
Modified
2026-07-22T23:01:08.001395495Z
Severity
  • 5.1 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:H/SI:L/SA:N CVSS Calculator
Summary
n8n: Custom Header Credential Values Leaked in Plaintext into LLM Node Execution Data
Details

Impact

Custom HTTP headers configured in credentials for certain LLM sub-nodes (including OpenAI, Anthropic, and Lemonade) are masked in the n8n UI but are written in plaintext into execution data during workflow runs. Any authenticated user with access to the execution data for an affected workflow can read the header names and values, which typically contain API keys or other secrets.

Because execution data can be persisted to the database and exported, leaked values may remain accessible beyond the lifetime of a single execution.

This issue only affects instances where workflows use LLM sub-nodes with custom headers defined in their credentials.

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 access to execution data to fully trusted users only. - Avoid configuring custom headers in LLM node credentials; use alternative authentication mechanisms where possible. - Rotate any API keys or secrets that may have been stored as custom header values in affected credentials.

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

Database specific 
{
    "github_reviewed": true,
    "github_reviewed_at": "2026-07-22T22:54:01Z",
    "severity": "MODERATE",
    "nvd_published_at": null,
    "cwe_ids": [
        "CWE-532"
    ]
}
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
0Unknown 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-89gh-3pgc-v5h2/GHSA-89gh-3pgc-v5h2.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-89gh-3pgc-v5h2/GHSA-89gh-3pgc-v5h2.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-89gh-3pgc-v5h2/GHSA-89gh-3pgc-v5h2.json"