EUVD-2026-90642
GHSA-c6j4-7wv3-xqf9
Severity by source
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Network injection with no auth/UI, but AC:H reflects the required vulnerable Supabase Filters-String workflow; S:C because the impacted component is the separate database, with full read/update/delete CIA.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
5DescriptionCVE.org
n8n versions before 1.123.80, from 2.0.0 before 2.39.6, and from 2.40.0 before 2.40.1 contain a filter injection vulnerability in the Supabase node's Filters (String) mode that fails to escape field values. Attackers can inject filter expressions from untrusted input to read all table rows, update all records, or delete entire tables in a single request.
Articles & Coverage 1
AnalysisAI
Unauthenticated filter injection in the n8n Supabase node's 'Filters (String)' mode allows attackers to manipulate PostgREST queries and read, update, or delete all records in connected Supabase tables in a single request. The flaw affects n8n versions before 1.123.80, 2.0.0 through 2.39.5, and 2.40.0, but only when a workflow passes untrusted input to the vulnerable node. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires an n8n workflow that uses the Supabase node specifically in 'Filters (String)' mode AND feeds attacker-influenced untrusted input (e.g. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a genuine high-impact data-integrity/confidentiality flaw but with a meaningful configuration gate, so it sits between 'real priority' and 'situational'. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade to n8n 1.123.80, 2.39.6, or 2.40.1 depending on the release branch. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all n8n instances and identify any using the Supabase node in 'Filters (String)' mode with untrusted input; if affected versions are present (before 1.123.80, 2.0.0 through 2.39.5, or 2.40.0), apply the vendor patch or upgrade to the vendor-recommended fixed release (patch available per vendor advisory), and restrict workflow inputs or disable the vulnerable node until patched. …
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External POC / Exploit Code
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