CVE-2026-118678
High · 7.1CVSS
7.1
EPSS
0.3%
Published
Oct 28, 2026
CISA due date
—
The record
n8n before 2.41.4 and 2.42.x before 2.42.1 contains a prototype pollution vulnerability that allows low-privileged users to alter built-in object behaviour by saving workflows with specially named connection keys. Attackers can add keys such as __proto__ to workflow connections, which the periodic history compaction task processes, causing logins and writes to fail with server errors.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|
Related vulnerabilities
- CVE-2026-63402 i18next is an internationalization framework for JavaScript. CWE-1321
- CVE-2026-119569 Parse Server before 8.6.108 and 9.0.0 before 9.10.5-alpha.9 contains a prototype… CWE-1321
- CVE-2026-118777 Forge (also called node-forge) is a native implementation of Transport Layer Security in… CWE-1321
- CVE-2026-118649 n8n before 2.43.5 and 2.44.x before 2.44.1 accepts a client-supplied workflow ID and… CWE-1321
- CVE-2026-118249 Highcharts JS is a JavaScript charting library based on SVG. CWE-1321
- CVE-2026-118250 Highcharts JS is a JavaScript charting library based on SVG. CWE-1321
- CVE-2026-118248 Highcharts JS is a JavaScript charting library based on SVG. CWE-1321
- CVE-2026-118243 Highcharts JS is a JavaScript charting library based on SVG. CWE-1321