CVE-2026-59259: n8n before versions 1.123.61, 2.27.4, and 2.28.1 contains a permission bypass vulnerability in external secret

Q: How do I fix CVE-2026-59259?

n8n: upgrade to 1.123.61, 2.27.4. Exact commands for each OS are on this page.

Q: Is CVE-2026-59259 being exploited?

CVE-2026-59259 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-59259 affect?

CVE-2026-59259 affects n8n. Severity is medium (CVSS 6.5). n8n before versions 1.123.61, 2.27.4, and 2.28.1 contains a permission bypass vulnerability in external secrets handling caused by a mismatch between the static validation check and the runtime expression engine. An authenticated user with

Q: How urgent is CVE-2026-59259?

Priority 32/100. No elevated risk signals yet.

Routine

MEDIUM 6.5UPGRADE

CVE-2026-59259 is a medium-severity flaw (CVSS 6.5) affecting n8n. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

n8n before versions 1.123.61, 2.27.4, and 2.28.1 contains a permission bypass vulnerability in external secrets handling caused by a mismatch between the static validation check and the runtime expression engine. An authenticated user with credential create or update permissions but without the externalSecret:list scope can embed external secret references into credentials in forms the static validation does not detect; these references resolve a

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.4% (top 63%)
CISA exploited list	No
Weakness	CWE-639
Published	2026-07-15
Last modified	2026-10-24

Publisher (CNA): VulnCheck · Vendor: n8n

Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-15 12:18 UTCPublished CVE record published
2026-10-24 21:10 UTCUpdated Record last modified

n8n n8n UPGRADE

Affected: < 1.123.61 · >= 2.0.0 and < 2.27.4 · 2.28.0

Fixed in: 1.123.61, 2.27.4

Safe to downgrade to: a release before 2.0.0

1. Check installed version

npm ls n8n

2. UPGRADE to 1.123.61

npm install n8n@">=1.123.61"

3. If no update is available yet, DOWNGRADE to a release before 2.0.0

npm view n8n versions npm install n8n@"<2.0.0"

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-59259?

n8n: upgrade to 1.123.61, 2.27.4. Exact commands for each OS are on this page.

Is CVE-2026-59259 being exploited?

CVE-2026-59259 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-59259 affect?

CVE-2026-59259 affects n8n. Severity is medium (CVSS 6.5). n8n before versions 1.123.61, 2.27.4, and 2.28.1 contains a permission bypass vulnerability in external secrets handling caused by a mismatch between the static validation check and the runtime expression engine. An authenticated user with

How urgent is CVE-2026-59259?

Priority 32/100. No elevated risk signals yet.

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References

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