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CVE

CVE-2026-21858

n8n Vulnerable to Unauthenticated File Access via Improper Webhook Request Handling
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CVE

CVE-2026-21858

n8n Vulnerable to Unauthenticated File Access via Improper Webhook Request Handling

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.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
10
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
C
H
U
-

Related Resources

No items found.

References

https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/21xxx/CVE-2026-21858.json, https://github.com/n8n-io/n8n/security/advisories/GHSA-v4pr-fm98-w9pg, https://nvd.nist.gov/vuln/detail/CVE-2026-21858, https://www.cyera.com/research-labs/ni8mare-unauthenticated-remote-code-execution-in-n8n-cve-2026-21858

Severity

10

CVSS Score
0
10

Basic Information

Ecosystem
Base CVSS
10
EPSS Probability
0.02955%
EPSS Percentile
0.86045%
Introduced Version
247bcc16c8344e9734bf00e198c11cfa3fd2479a
Fix Available
faae32934230ca3f0a7da1798e6737c3891ef250

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