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EUVD-2026-42258Published

n8n before versions 1.123.18 and 2.6.2 fails to verify HMAC-SHA256 signatures on Zendesk webhooks in the ZendeskTrigger node. Attackers who know the webhook URL can send unsigned POST requests to trigger workflows with arbitrary malicious d…

Exact source revision recorded 1 Nov 2026 10:14:23 UTC. It does not establish the source's current position. Latest evidence.

Recorded JSON

euvd · EUVD-2026-42258

Published

n8n before versions 1.123.18 and 2.6.2 fails to verify HMAC-SHA256 signatures on Zendesk webhooks in the ZendeskTrigger node. Attackers who know the webhook URL can send unsigned POST requests to trigger workflows with arbitrary malicious data.

EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.

Original publisher date fields

datePublished: Jul 8, 2026, 1:49:03 PM

dateUpdated: Jul 8, 2026, 2:26:33 PM

1 related source bulletins · separate from aliases

NCSC-2026-0248: Kwetsbaarheden verholpen in n8n workflow automation platform

CVE-2026-27493 · CVE-2026-27494 · CVE-2026-27495 · CVE-2026-27497 · CVE-2026-27498 · CVE-2026-27577 · CVE-2026-27578 · CVE-2026-56357 · CVE-2026-56350 · CVE-2026-56360 · CVE-2026-56349 · CVE-2026-56353

Source published
Jul 8, 2026, 1:49:03 PM (timezone not stated)
Source modified
Jul 8, 2026, 2:26:33 PM (timezone not stated)
Observed here
1 Nov 2026 10:14:23 UTC
Source terms
ENISA EUVD · source terms and attribution apply

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: euvd · ENISA EUVD · source terms and attribution apply. Source text is retained; field grouping and change labels are provided by ChangeIntel.

EUVD CVSS 4.0 · 6.3 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N

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Sources read 7 Nov 20:55 UTC · 275 of 275 readable · 273 fully read · documentation 469/469 current

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