CVE-2026-103258CWE-943

CVE-2026-103258

Medium · published October 1, 2026

CVSS v3.1
6.8
EPSS
0%
Percentile
21.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.8 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N
CVSS v4.0
6.9 · CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:H/SI:N/SA:N
EPSS
0.00302 · 21.8th percentile
Weakness
CWE-943 · Improper Neutralization of Special Elements in Data Query Logic
Published
2026-10-01T15:17Z
References (2)
https://github.com/n8n-io/n8n/security/advisories/GHSA-5pg9-2vqx-r6jm · [email protected]https://www.vulncheck.com/advisories/n8n-before-2.39.6-and-2.40-x-before-2.40.1-filter-bypass-via-parameter-interpolation · [email protected]
EPSS history
Timeline
  • 03 OCT 03:41Z
    EPSS moved — → 0%
    epss
  • 01 OCT 10:42Z
    n8n before 2.39.6 and 2.40.x before 2.40.1 Filter Bypass via Parameter Interpolation
    cvelistv5