n8n: Disabled OIDC SSO Endpoints Remain Active and Issue Valid Sessions

Impact The public OIDC login and callback endpoints ran the full flow whether or not OIDC was the instance's active, enabled authentication method, so turning OIDC off in Settings did not stop it issuing sessions. An administrator who disabled the provider still had a working login route. The pat...

EUVD-2026-74272

n8n: Disabled OIDC SSO Endpoints Remain Active and Issue Valid Sessions...

n8n: GitHub Trigger 422 Reuse Path Skips Webhook Secret Storage, Causing Signature Verification to Fail-Open

Impact The GitHub Trigger generated a signing secret when it registered a webhook and verified X-Hub-Signature-256 on each delivery. When GitHub answered the create request with a 422 because a webhook for the URL already existed, the node adopted the remote hook but kept only its id and events,...

EUVD-2026-74276

n8n: GitHub Trigger 422 Reuse Path Skips Webhook Secret Storage, Causing Signature Verification to Fail-Open...

NPM: n8n: GitHub Trigger 422 Reuse Path Skips Webhook Secret Storage, Causing Signature Verification to Fail-Open

NPM: n8n: GitHub Trigger 422 Reuse Path Skips Webhook Secret Storage, Causing Signature Verification to Fail-Open vulnerability discovered by ? in WordPress Npm n8n versions 1.123.76...

NPM: n8n: Path Injection in Elasticsearch and ElasticSecurity Nodes via Unencoded Identifiers

NPM: n8n: Path Injection in Elasticsearch and ElasticSecurity Nodes via Unencoded Identifiers vulnerability discovered by ? in WordPress Npm n8n versions 1.123.76...

EUVD-2026-74277

n8n: Path Injection in Elasticsearch and ElasticSecurity Nodes via Unencoded Identifiers...

n8n: Path Injection in Elasticsearch and ElasticSecurity Nodes via Unencoded Identifiers

Impact The Elasticsearch and ElasticSecurity nodes built REST endpoints by interpolating user-provided identifiers straight into the request path. A value containing path separators or dot segments changed which endpoint the request actually reached, so an operation intended for one document coul...

NPM: n8n: Prototype Pollution via Workflow Structure Summary Can Lead to Denial of Service

NPM: n8n: Prototype Pollution via Workflow Structure Summary Can Lead to Denial of Service vulnerability discovered by ? in WordPress Npm n8n versions 2.37.7...

EUVD-2026-74278

n8n: Prototype Pollution via Workflow Structure Summary Can Lead to Denial of Service...

n8n: Prototype Pollution via Workflow Structure Summary Can Lead to Denial of Service

Impact The Instance AI workflow summary built its result with get-or-create-then-nested-write idioms keyed by node names and connection keys taken from the stored workflow. Those are arbitrary strings: the restricted-name guard n8n shows in the editor is client-side and is bypassed by posting the...

n8n: Cross-User Active Workflow ID and Lifecycle Event Disclosure via Missing userId Filter

Impact The endpoint /rest/active-workflows returned every active workflow ID on the instance to any member, regardless of sharing, and workflow activation, deactivation and publication push events were broadcast to every connected client, carrying workflow IDs, version IDs and activation-error...

NPM: n8n: Cross-User Active Workflow ID and Lifecycle Event Disclosure via Missing userId Filter

NPM: n8n: Cross-User Active Workflow ID and Lifecycle Event Disclosure via Missing userId Filter vulnerability discovered by ? in WordPress Npm n8n versions 1.123.76...

EUVD-2026-74269

n8n: Cross-User Active Workflow ID and Lifecycle Event Disclosure via Missing userId Filter...

n8n: Expression Sandbox Escape via Shared Builtin Tampering and Code-Printer Injection Leads to Code Execution

Impact Two stages of expression code generation built source text by calling the global JSON.stringify at generation time: the compiler when printing synthetic string literals, and the isolate bridge when interpolating a timezone value into its per-evaluation wrapper. An expression that replaced...

EUVD-2026-74273

n8n: Expression Sandbox Escape via Shared Builtin Tampering and Code-Printer Injection Leads to Code Execution...

EUVD-2026-74279

n8n: Anonymous Approval-Gate Bypass via Reused resumeToken over the Chat WebSocket...

n8n: Anonymous Approval-Gate Bypass via Reused resumeToken over the Chat WebSocket

Impact The /chat WebSocket route resumed a paused execution from a resume token without checking that the node being resumed was a chat node. n8n hands that token to anonymous form submitters, so a party with no account could present it on the chat route and release an execution waiting at an...

CVE-2026-21858-and-CVE-2025-68613

Ni8mare: n8n Pre-Auth RCE CVE-2026-21858 & CVE-2025-68613 — Vulnerability Lab & PoC Report Hands-on lab environment Vulnerable Lab and a detailed exploitation analysis report of the Ni8mare vulnerability chain on the n8n platform — from Arbitrary File Read CVE-2026-21858 to Remote Code Execution...

CVE-2025-68613

CVE-2025-68613 — n8n RCE via Expression Injection For educational and authorized security research purposes only. Overview Critical RCE vulnerability CVSS 9.9 in n8n workflow automation platform. Authenticated users can execute arbitrary OS commands via the executeCommand node, bypassing sandbox...