CVE-2026-56353 json
n8n - Authentication Bypass in Chat Trigger Node
published 2026-02-26 8 mo ago modified 2026-10-24 15 d ago also GHSA-jh8h-6c9q-7gmw , EUVD-2026-44626
- cvss
- 4.8
- 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 26%
- public exploits
- 0
- none known
Summary
n8n contains an authentication bypass in the Chat Trigger node when configured with n8n User Auth (a non-default configuration). In affected releases — before 1.123.22, the 2.0.0 through 2.9.2 line, and 2.10.0 — the authentication check on the Chat Trigger webhook endpoint can be circumvented, allowing access without valid credentials. Fixed in 1.123.22, 2.9.3, and 2.10.1.
Patch / fix
- npm n8n 1.123.22, 2.9.3, 2.10.1
- n8n n8n 1.123.22, 2.9.3, 2.10.1
- github.com/n8n-io/n8n@062644e commit
- github.com/n8n-io/n8n@1479aab commit
- github.com/n8n-io/n8n@9e5212e commit
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 3 mo ago
Exploit prediction
0.33% chance of exploitation in the next 30 days, higher than 26% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 6.3 | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N |
| CNA | 3.1 | 4.8 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N |
| CNA | 4.0 | 6.3 | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| GitHub | 3.1 | 4.8 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | n8n | <1.123.22 >=2.0.0, <2.9.3 >=2.10.0, <2.10.1 |
1.123.22 2.9.3 2.10.1 |
Affected products
- n8n n8n
Classification
- Weakness
-
- CWE-287 Improper Authentication
References
-
github.com
/n8n-io/n8n/commit/062644ef786b6af480afe4a0f12bc6d70040534a
web
-
github.com
/n8n-io/n8n/commit/1479aab2d32fe0ee087f82b9038b1035c98be2f6
web
-
github.com
/n8n-io/n8n/commit/9e5212ecbc5d2d4e6f340b636a5e84be6369882e
web
-
github.com
/n8n-io/n8n/security/advisories/GHSA-jh8h-6c9q-7gmw
vendor-advisory, web
-
vulncheck.com
/advisories/n8n-authentication-bypass-in-chat-trigger-node
third-party-advisory
-
github.com
/n8n-io/n8n
package
Sources
- CVE List CVE-2026-56353
- GitHub Advisory GHSA-jh8h-6c9q-7gmw
- NVD CVE-2026-56353
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