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CVE-2026-65591

n8n before 1.123.64 Sanitizer Bypass Remote Code Execution

HIGH
8.8
CVSS Score
Published: July 22, 2026 at 11:21 AM UTC
Updated: October 29, 2026 at 09:16 PM UTC
2 products affected across 2 vendorsN8NN8N

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Severity
HIGH8.8
Exploit prediction
EPSS 0.7%
SSVC
No known exploit

Description

n8n contains a sanitizer bypass vulnerability in the legacy expression evaluator's computed-member handler. An authenticated user with workflow create or modify permissions can craft a malicious expression to bypass the sanitizer and achieve host-level code execution as the n8n process. The legacy expression engine is the default in affected versions. Fixed in n8n 1.123.64, 2.29.8, and 2.30.1.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

N8N· N8Nnpm
95%
v < 1.123.642.0.0 ≤ v < 2.29.82.30.0
Affected range stops below 1.123.64, so it looks safe — our inference, not a vendor statement
Affected range stops below 2.29.8, so it looks safe — our inference, not a vendor statement
Affected range stops below 2.30.1, so it looks safe — our inference, not a vendor statement
N8N· N8N Io
90%
0 ≤ v < 1.123.640 ≤ v < 2.29.80 ≤ v < 2.30.1
Vendor states this is fixed in 1.123.64 (unaffected)
Vendor states this is fixed in 2.29.8 (unaffected)
Vendor states this is fixed in 2.30.1 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

Vendor AdvisoryMitigation
Source: cverecord
https://github.com/n8n-io/n8n/security/advisories/GHSA-pm35-fqvh-cq5g
Third Party Advisory
Source: cverecord
https://www.vulncheck.com/advisories/n8n-before-sanitizer-bypass-remote-code-execution

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.8HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-917

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