CVE-2026-103258
n8n before 2.39.6 and 2.40.x before 2.40.1 Filter Bypass via Parameter Interpolation
CVSS Score
6.8
EPSS Score
0.0%
EPSS Percentile
0th
n8n versions before 2.39.6 and 2.40.0 before 2.40.1 contain an unescaped parameter interpolation vulnerability in SendGrid, Freshservice, and ServiceNow nodes that allows attackers to bypass filters by breaking out of query literals. Attackers can exploit this by binding vulnerable node parameters to untrusted external input to widen single-record lookups into match-all queries, exposing bulk data including contact lists, tickets, and directory entries.
| CWE | CWE-943 |
| Vendor | n8n-io |
| Product | n8n |
| Published | Oct 1, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
None
Availability
None
Affected Versions
n8n-io / n8n
0 < 2.39.6 2.40.0 < 2.40.1
References
Credits
🔍 DarkLycn1976