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.
Metrics
Affected Vendors & Products
References
History
Tue, 06 Oct 2026 01:30:00 +0000
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| Metrics |
ssvc
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Thu, 01 Oct 2026 11:00:00 +0000
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| Description | 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. | |
| Title | n8n before 2.39.6 and 2.40.x before 2.40.1 Filter Bypass via Parameter Interpolation | |
| First Time appeared |
N8n
N8n n8n |
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| Weaknesses | CWE-943 | |
| CPEs | cpe:2.3:a:n8n:n8n:*:*:*:*:*:*:*:* | |
| Vendors & Products |
N8n
N8n n8n |
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| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: VulnCheck
Published: 2026-10-01T10:42:02.133Z
Updated: 2026-10-06T00:08:00.691Z
Reserved: 2026-09-30T10:55:39.869Z
Link: CVE-2026-103258
Updated: 2026-10-06T00:07:56.722Z
Status : Deferred
Published: 2026-10-01T11:17:20.293
Modified: 2026-10-06T01:16:32.623
Link: CVE-2026-103258
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