CVE-2026-85172: n8n versions before 2.34.1 contain a server-side request forgery vulnerability in the legacy request helper fu

Routine

MEDIUM 6.4UPGRADE

CVE-2026-85172 is a medium-severity flaw (CVSS 6.4) affecting n8n. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

n8n versions before 2.34.1 contain a server-side request forgery vulnerability in the legacy request helper function exposed to Code and Function nodes. The validation logic checks the uri property for SSRF safety while the underlying HTTP client uses the url property when both are present, allowing attackers to bypass validation by supplying a safe uri alongside a malicious url to access internal addresses.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 82%)
CISA exploited list	No
Weakness	CWE-918
Published	2026-09-03
Last modified	2026-09-16

Publisher (CNA): VulnCheck · Vendor: n8n

Last updated 2026-09-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-09-03 13:06 UTCPublished CVE record published
2026-09-16 21:26 UTCUpdated Record last modified

n8n n8n UPGRADE

Affected: < 2.33.4 · 2.34.0

Fixed in: 2.33.4

Safe to downgrade to: no unaffected older release

1. Check installed version

npm ls n8n

2. UPGRADE to 2.33.4

npm install n8n@">=2.33.4"

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-2026-85172?

n8n: upgrade to 2.33.4. Exact commands for each OS are on this page.

Is CVE-2026-85172 being exploited?

CVE-2026-85172 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-2026-85172 affect?

CVE-2026-85172 affects n8n. Severity is medium (CVSS 6.4). n8n versions before 2.34.1 contain a server-side request forgery vulnerability in the legacy request helper function exposed to Code and Function nodes. The validation logic checks the uri property for SSRF safety while the underlying HTTP

How urgent is CVE-2026-85172?

Priority 27/100. No elevated risk signals yet.

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References

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