n8n has a Webhook Node IP Whitelist Bypass via Partial String Matching

published 2026-01-13 9 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-2029 , GHSA-w96v-gf22-crwp

cvss: 5.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 22%
public exploits: 0; none known

n8n is an open source workflow automation platform. From 1.36.0 to before 2.2.0, the Webhook node’s IP whitelist validation performed partial string matching instead of exact IP comparison. As a result, an incoming request could be accepted if the source IP address merely contained the configured whitelist entry as a substring. This issue affected instances where workflow editors relied on IP-based access controls to restrict webhook access. Both IPv4 and IPv6 addresses were impacted. An attacker with a non-whitelisted IP could bypass restrictions if their IP shared a partial prefix with a trusted address, undermining the intended security boundary. This vulnerability is fixed in 2.2.0.

Patch / fix

fixed in 2 links 3

npm n8n 2.2.0
n8n n8n 2.2.0

github.com/n8n-io/n8n@11f8597 commit
github.com/n8n-io/n8n/issues/23399 patch
github.com/n8n-io/n8n#23399 pull request

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 9 mo ago (2026-01-13)

Exploit prediction

0.30% chance of exploitation in the next 30 days, higher than 22% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
GitHub	3.1	5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected packages

ecosystem	package	affected	fixed in
npm	n8n	>=1.36.0, <2.2.0	2.2.0

Affected products

n8n-io n8n

Classification

Weakness

CWE-134 Use of Externally-Controlled Format String
CWE-284 Improper Access Control
CWE-183 Permissive List of Allowed Inputs

References

github.com /n8n-io/n8n/pull/23399
web, issue-tracking, patch
github.com /n8n-io/n8n/commit/11f8597d4ad69ea3b58941573997fdbc4de1fec5
web, patch
github.com /n8n-io/n8n/issues/23399
web, issue-tracking, patch
github.com /n8n-io/n8n/security/advisories/GHSA-w96v-gf22-crwp
web, vendor-advisory
nvd.nist.gov /vuln/detail/CVE-2025-68949
advisory
github.com /n8n-io/n8n
package

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.

Summary