CVE-2026-21858: critical vulnerability in n8n-io n8n
n8n Vulnerable to Unauthenticated File Access via Improper Webhook Request Handling
Published · Updated
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100Vexday Risk Score
Patch now. It exploitation observed by VulnCheck and has a working public exploit.
ssvc Actcvss 10epss 78%
from disclosure to weaponsame day
Published on NVDJan 7
1st PoCJan 7
VulnCheck+2d
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/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
Affected products
n8n-io · n8npublic PoCs found — 16
githubgithub.com/EQSTLab/CVE-2026-21858★ 1githubgithub.com/Bannt08/Research-CVE-2026-21858★ 0githubgithub.com/Fomovet/cve-2026-21858★ 0vulncheckvulncheck.com/xdb/f15a97029199unverifiedvulncheckvulncheck.com/xdb/409487e4588dunverifiedvulncheckvulncheck.com/xdb/86a1a7f72171unverifiedvulncheckvulncheck.com/xdb/f8d30571f2e3unverifiedvulncheckvulncheck.com/xdb/c9b953c6cac3unverifiedvulncheckvulncheck.com/xdb/35c3fc481706unverifiedvulncheckvulncheck.com/xdb/0073e0bf5d75unverifiedvulncheckvulncheck.com/xdb/095e9bf65739unverifiedvulncheckvulncheck.com/xdb/c7640c1a1360unverifiedvulncheckvulncheck.com/xdb/5413c2d837b0unverifiedvulncheckvulncheck.com/xdb/446ec9875c1dunverifiedvulncheckvulncheck.com/xdb/cfcdc9ef58dcunverifiedvulncheckvulncheck.com/xdb/eecee81f9ae3unverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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