n8n before 1.123.69 Stored XSS via Form Completion Page
Published Aug 20, 2026
8.4
HIGHCVSS 4.0
EPSS 0.31%
Description
n8n before 1.123.69, 2.33.4, and 2.34.1 contains a stored cross-site scripting vulnerability in the Form node's completion page. The completion page applied its sandboxing Content-Security-Policy only when respondWith was not set to 'redirect', but responseText was always rendered as raw HTML. An authenticated member could set respondWith to 'redirect' via an expression while keeping responseText populated, causing the completion page to serve unsanitized HTML and script from the n8n origin. Any visitor who submitted the resulting public form would have that script execute same-origin with their session.
Affected products
-
- Version 0StatusaffectedConstraints<1.123.69
- Version 0StatusaffectedConstraints<2.33.4
- Version 0StatusaffectedConstraints<2.34.1
- Version 1.123.69StatusunaffectedConstraints-
- Version 2.33.4StatusunaffectedConstraints-
- Version 2.34.1StatusunaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
1 other source (NVD) ▾
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/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
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
NoTechnical Impact
TotalDecision
n/aAssessed Aug 20, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
Score over time
Aug-Oct 2026- EPSS v5
Percentile over time
- EPSS v5
Table of values (2 key points)
Flat stretches are collapsed. Showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 0.31% (0.00306) | 21.21th | v5 (v2026.06.15) |
| Aug 21, 2026 | 0.24% (0.00243) | 15.80th | v5 (v2026.06.15) |
References (2)
- https://github.com/n8n-io/n8n/security/advisories/GHSA-rmr5-775f-jvm2 vendor-advisoryMitigationVendor Advisory
- https://www.vulncheck.com/advisories/n8n-before-stored-xss-via-form-completion-page third-party-advisoryThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| https://github.com/n8n-io/n8n/security/advisories/GHSA-rmr5-775f-jvm2 | vendor-advisoryMitigationVendor Advisory | |
| https://www.vulncheck.com/advisories/n8n-before-stored-xss-via-form-completion-page | third-party-advisoryThird Party Advisory |
Change history (0)
No recorded changes yet.