How severe is CVE-2026-65589?

No CVSS score has been assigned to CVE-2026-65589 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by CVE-2026-65589?

CVE-2026-65589 affects the following packages: n8n (npm), n8n (npm), n8n (npm). Ecosystems affected: npm.

How do I fix CVE-2026-65589?

Update n8n to 1.123.64 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-65589 is resolved across your whole dependency graph.

How do I detect CVE-2026-65589 in my npm dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for n8n, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2026-65589 if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Is CVE-2026-65589 actively exploited in the wild?

No public exploit code has been indexed for CVE-2026-65589 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2026-65589?

CVE-2026-65589 has an EPSS (Exploit Prediction Scoring System) score of 0.5%, placing it in the 41th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2026-65589?

CVE-2026-65589 is classified as CWE-532 (CWE-532). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2026-65589 published, and has it been updated?

CVE-2026-65589 was published on July 22, 2026 and was last updated on October 21, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

📦 npm

Not in CISA KEV

CVE-2026-65589 — n8n

CVE-2026-65589 is a CWE-532 vulnerability in n8n. A fix is available for n8n — see the affected versions and patch details below.

n8n before 1.123.64 Credential Exposure via LLM Node Execution Data

Also known asGHSA-89gh-3pgc-v5h2

Published

Jul 22, 2026

Updated

Oct 21, 2026

Affected

3 pkgs

Patched

3 / 3

Exploits

None indexed

Exploitation data as of Oct 23, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2026-65589.

EPSS Exploitation Probability

via FIRST.org ↗

0.5%probability of exploitation in next 30 days

Lower Risk+0.11%

Lower risk than most CVEs41th percentile — riskier than 41% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

Real-World Exposure

3 pkgs affected

How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.

36other npm packages depend on this — each one inherits the vulnerability until it's patched upstream

n8nnpm

80Kdownloads / week

Description

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.

Affected Packages

3 total 3 fixed

Ecosystem	Package	Vulnerable range	Fix
📦npm	`n8n`	all versions	1.123.64`npm install n8n@1.123.64`
📦npm	`n8n`	≥ 2.30.0&&< 2.30.1	2.30.1`npm install n8n@2.30.1`
📦npm	`n8n`	≥ 2.0.0-rc.0&&< 2.29.8	2.29.8`npm install n8n@2.29.8`

Affected Products

1 product · 6 configurations

Application

n8nn8n

≥ 2.0.0 && < 2.29.8

1 version

2.30.0

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for n8n, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update n8n to 1.123.64 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-65589 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

## 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 LL

O3 Security · Impact-Aware SCA

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CVE-2026-65589 — n8n

Exploitation Status

No confirmed exploitation observed yet

EPSS Exploitation Probability

Real-World Exposure

Description

Impact

Patches

Workarounds

Affected Packages

Affected Products

Detection & mitigation playbook

Detect

Fix

Workarounds

Frequently Asked Questions

Is CVE-2026-65589 in your dependencies?