CVE-2026-86079: n8n: Path Injection in Elasticsearch and ElasticSecurity Nodes via Unencoded Identifiers

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-08 · updated 2026-09-11
Weakness: CWE-22

Description

n8n is an open source workflow automation platform. Prior to 1.123.76, 2.37.7, and 2.38.2, the Elasticsearch and ElasticSecurity nodes interpolated workflow-controlled index and document identifiers directly into REST request paths. An identifier containing path separators or dot segments could select another index or a cluster administration endpoint under the stored Elasticsearch credential. The affected request construction includes packages/nodes-base/nodes/Elastic/Elasticsearch/GenericFunctions.ts and the missing toPathSegment encoding. This issue is fixed in versions 1.123.76, 2.37.7 and 2.38.2.

Affected products

n8n-io n8n: before 1.123.76; from 2.0.0 before 2.37.7; from 2.38.0 before 2.38.2 — fixed in 1.123.76, 2.37.7, 2.38.2

How to fix

Upgrade to a fixed version: n8n-io n8n 1.123.76, 2.37.7, 2.38.2. Check the vendor advisory for mitigations.

References

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