Vulnerability · Published Jun 23, 2026 · Assigned by GitHub_M

CVE-2026-54308n8n: Missing Token Validation on Microsoft Agent 365 Trigger Node

Medium 6.3

In plain English

A medium-severity authentication bypass by spoofing in n8n from n8n-io. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 23% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)6.3Medium

Exploit odds (30 days)0.3%top 77.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

n8n is an open source workflow automation platform. Prior to 2.25.7 and 2.26.2, the MicrosoftAgent365Trigger and StripeTrigger node did not validate that inbound requests. As a result, an unauthenticated attacker who knows the webhook URL could submit a forged payload and cause the workflow to execute with attacker-controlled data. This vulnerability is fixed in 2.25.7 and 2.26.2.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	n8n	2.26.2	GHSA-jvc7-762p-3743
npm	n8n	2.25.7	GHSA-jvc7-762p-3743

Affected products (as reported)

Vendor	Product	Versions
n8n-io	n8n	>= 2.26.0, < 2.26.2< 2.25.7

Weakness: CWE-290 · Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

References

https://github.com/n8n-io/n8n/security/advisories/GHSA-jvc7-762p-3743 x_refsource_CONFIRM