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CVE-2026-21858

N8n vulnerability

10.0 CRITICALPublic exploitEPSS 78.2%
  1. Published7 Jan 2026

Description

n8n is an open source workflow automation platform. Versions starting with 1.65.0 and below 1.121.0 enable an attacker to access files on the underlying server through execution of certain form-based workflows. A vulnerable workflow could grant access to an unauthenticated remote attacker, resulting in exposure of sensitive information stored on the system and may enable further compromise depending on deployment configuration and workflow usage. This issue is fixed in version 1.121.0.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N

Affected products

N8n≥ 1.65.0 < 1.121.0

Remediation

Fixed in
N8n≥ 1.121.0

References

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Frequently asked

Is CVE-2026-21858 being actively exploited?

CVE-2026-21858 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 78.2%.

How severe is CVE-2026-21858?

CVE-2026-21858 has a CVSS 3.1 base score of 10.0, rated critical. EPSS estimates a 78.2% probability of exploitation.

Which products are affected by CVE-2026-21858?

Affected products include N8n.

How do I fix CVE-2026-21858?

Upgrade affected software to a fixed version, for example N8n 1.121.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-21858 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.