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Stored XSS in n8n Form Trigger allows Account Takeover via injected iframe and video/source

  • Veröffentlicht: 19.08.2025
  • Aktualisiert: 11.10.2026 10:22

Impact

A stored Cross-Site Scripting (XSS) vulnerability was identified in n8n, specifically in the Form Trigger node's HTML form element. An authenticated attacker can inject malicious HTML via an <iframe> with a srcdoc payload that includes arbitrary JavaScript execution. The attacker can also inject malicious Javascript by using <video> coupled <source> using an onerror event.

While using iframe or a combination of video and source tag, this vulnerability allows for Account Takeover (ATO) by exfiltrating n8n-browserId and session cookies from authenticated users who visit a maliciously crafted form. Using these tokens and cookies, an attacker can impersonate the victim and change account details such as email addresses, enabling full control over the account—especially if 2FA is not enabled.

Patches

The issue was addressed in PR #16329. Users should upgrade to version >=1.98.2.

Workarounds

Apart from updating to the fixed version, n8n instance administrators can:

  • Configure a reverse proxy to serve webhook requests from a different domain [docs].
  • Disable or restrict use of the Form Trigger node, particularly the HTML element type.
  • Use a Content Security Policy (CSP) to block execution of inline scripts and disallow use of srcdoc.

References

Betroffene Software

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PlattformPaketAnfällige VersionenBehoben in
npm-Paket n8n >= 1.77.0, < 1.98.2 1.98.2

Verweise

CVSS-Wert 8.7/10
CVSS-Vektor
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
Schwäche (CWE)
CWE-79
Plattform
npm
Paket
n8n
Veröffentlicht
19.08.2025
Aktualisiert
11.10.2026 10:22

Quellen und Lizenzen

OSV / GitHub Advisory Database - GHSA-hfmv-hhh3-43f2 - CC BY 4.0

Schwachstellenhistorie: n8n

Alle veröffentlichten Schwachstellen dieses Pakets (npm-Paket), neueste zuerst. Zeigt, ob es ein einmaliger Ausrutscher ist oder ein Paket, das man im Auge behalten muss.

Alle (156) im Archiv
Einträge insgesamt
156
Erste → letzte
05.2023 09.2026
Ohne Fix
1
In Angriffen ausgenutzt
1

Verteilung nach Schweregrad

  • Kritisch 24
  • Hoch 58
  • Mittel 74

Veröffentlichungen pro Jahr

Schweregrad:
  1. Stored XSS in n8n Form Trigger allows Account Takeover via injected iframe and video/source dieser Eintrag
    Hoch · 8.7 CVE-2025-52478 >= 1.77.0, < 1.98.2 1.98.2
  2. n8n: Expression Sandbox Escape via Shared Builtin Tampering and Code-Printer Injection Leads to Code Execution
    Hoch CVE-2026-86083 < 1.123.76, >= 2.38.0, < 2.38.2, >= 2.0.0, < 2.37.7 1.123.76, 2.38.2, 2.37.7
  3. n8n: Domain-Restriction Bypass via Unguarded Model-Search Endpoint in OpenAI Chat Model Node
    Hoch CVE-2026-86082 < 1.123.76, >= 2.38.0, < 2.38.2, >= 2.0.0, < 2.37.7 1.123.76, 2.38.2, 2.37.7
  4. n8n: Regular Expression Denial of Service in the Default Blocked-File-Pattern Match via a Git Node Clone Path
    Hoch CVE-2026-86081 < 1.123.76, >= 2.38.0, < 2.38.2, >= 2.0.0, < 2.37.7 1.123.76, 2.38.2, 2.37.7
  5. n8n: Unauthenticated Persistent Storage Exhaustion via OAuth Dynamic Client Registration Endpoint
    Hoch CVE-2026-86075 >= 2.38.0, < 2.38.2, < 2.37.7 2.38.2, 2.37.7
  6. n8n: Expression Sandbox Escape via Class-Field Sanitizer Rebinding Can Lead to Code Execution
    Hoch CVE-2026-86076 < 1.123.76, >= 2.38.0, < 2.38.2, >= 2.0.0, < 2.37.7 1.123.76, 2.38.2, 2.37.7
  7. n8n: Prototype Pollution via Dot-Notation Field Names Leads To Instance-Wide Denial of Service
    Hoch CVE-2026-72749 < 1.123.67, >= 2.32.0, < 2.32.1, >= 2.0.0-rc.0, < 2.31.5 1.123.67, 2.32.1, 2.31.5
  8. n8n: Edit Image Node Format Injection Allows Arbitrary File Write
    Hoch CVE-2026-72762 < 1.123.67, >= 2.32.0, < 2.32.1, >= 2.0.0-rc.0, < 2.31.5 1.123.67, 2.32.1, 2.31.5
  9. n8n: Shared-Workflow Editor Can Exfiltrate Credentials via Inline Sub-Workflow JSON
    Hoch CVE-2026-72763 < 1.123.67, >= 2.32.0, < 2.32.1, >= 2.0.0-rc.0, < 2.31.5 1.123.67, 2.32.1, 2.31.5
  10. n8n: Credential Authorization Bypass via Expression in HTTP Request Node `genericAuthType`
    Hoch CVE-2026-72774 < 1.123.67, >= 2.32.0, < 2.32.1, >= 2.0.0-rc.0, < 2.31.5 1.123.67, 2.32.1, 2.31.5
  11. n8n: Expression sandbox escape via arrow-function bodies enabling command execution
    Hoch CVE-2026-72765 >= 2.32.0, < 2.32.1, < 2.31.5 2.32.1, 2.31.5
  12. n8n: Send Email Node Arbitrary File Read and SSRF via Nodemailer Content-Object Type Confusion
    Hoch CVE-2026-72766 < 1.123.67, >= 2.32.0, < 2.32.1, >= 2.0.0-rc.0, < 2.31.5 1.123.67, 2.32.1, 2.31.5
  13. n8n: Authenticated code execution in the n8n Git node
    Hoch CVE-2026-72767 < 1.123.67, >= 2.32.0, < 2.32.1, >= 2.0.0-rc.0, < 2.31.5 1.123.67, 2.32.1, 2.31.5
  14. n8n: Git Node fetch/pull/pushTags Operations Bypass Sandbox Path Restriction
    Hoch CVE-2026-72770 < 1.123.67, >= 2.32.0, < 2.32.1, >= 2.0.0-rc.0, < 2.31.5 1.123.67, 2.32.1, 2.31.5
  15. n8n: Bypass "Allowed HTTP Request Domains" Credential Restriction in Multiple AI and LLM Nodes
    Hoch CVE-2026-72771 >= 2.32.0, < 2.32.1, < 2.31.5 2.32.1, 2.31.5
  16. n8n: Account Takeover via Unverified Email Claim in Token Exchange Embed Login
    Hoch CVE-2026-72772 >= 2.32.0, < 2.32.1, < 2.31.5 2.32.1, 2.31.5
  17. n8n: SSO Instance-Role Provisioning Allows Privilege Escalation to Instance Owner
    Hoch CVE-2026-65016 < 1.123.64, >= 2.30.0, < 2.30.1, >= 2.0.0-rc.0, < 2.29.8 1.123.64, 2.30.1, 2.29.8
  18. n8n: Legacy Expression Evaluator Sanitizer Bypass Leads to Authenticated Code Execution
    Hoch CVE-2026-65591 < 1.123.64, >= 2.30.0, < 2.30.1, >= 2.0.0-rc.0, < 2.29.8 1.123.64, 2.30.1, 2.29.8
  19. n8n: Privilege Escalation and Code Execution via Full Public API Key Scope Assignment to Token Exchange JWTs
    Hoch CVE-2026-65595 >= 2.30.0, < 2.30.1, < 2.29.8 2.30.1, 2.29.8
  20. n8n: Cross-Issuer Token Exchange Account Binding via Subject-Only Identity Resolution
    Hoch CVE-2026-59208 >= 2.28.0, < 2.28.1, < 2.27.4 2.28.1, 2.27.4
  21. n8n: "Allowed HTTP Request Domains" Restriction Bypass via AI Agents MCP Connector
    Hoch CVE-2026-59207 >= 2.28.0, < 2.28.1, < 2.27.4 2.28.1, 2.27.4
  22. n8n: Prototype Pollution via Workflow Credentials Leads to Unauthenticated User and Project Enumeration
    Hoch CVE-2026-59206 < 1.123.61, >= 2.28.0, < 2.28.1, >= 2.0.0-rc.0, < 2.27.4 1.123.61, 2.28.1, 2.27.4
  23. n8n: Shared Credential Header Leak via HTTP Request Pagination Expression
    Hoch CVE-2026-59209 < 1.123.61, >= 2.28.0, < 2.28.1, >= 2.0.0-rc.0, < 2.27.4 1.123.61, 2.28.1, 2.27.4
  24. n8n: Stored DOM XSS via Resource Locator `cachedResultUrl`
    Hoch CVE-2026-65592 < 1.123.64, >= 2.30.0, < 2.30.1, >= 2.0.0-rc.0, < 2.29.8 1.123.64, 2.30.1, 2.29.8
  25. n8n: DOM-Based XSS via Unsandboxed iframe srcdoc in HTML Preview
    Hoch CVE-2026-65597 < 1.123.64, >= 2.30.0, < 2.30.1, >= 2.0.0-rc.0, < 2.29.8 1.123.64, 2.30.1, 2.29.8
  26. n8n: Race Condition in Git Clone Node Allows Authenticated Users to Achieve Remote Code Execution
    Hoch CVE-2026-65598 < 1.123.64, >= 2.30.0, < 2.30.1, >= 2.0.0-rc.0, < 2.29.8 1.123.64, 2.30.1, 2.29.8
  27. n8n: AI Agents Project Viewer Privilege Escalation via run_node_tool
    Hoch CVE-2026-65015 >= 2.30.0, < 2.30.1, < 2.29.8 2.30.1, 2.29.8
  28. n8n: SecurityScorecard Node Leaks API Token to User-Controlled Host
    Hoch · 7.7 CVE-2026-54304 < 1.123.55, >= 2.26.0, < 2.26.1, >= 2.0.0-rc.0, < 2.25.7 1.123.55, 2.26.1, 2.25.7
  29. n8n: MCP Browser HTTP Transport Exposes Unauthenticated Browser-Control Sessions
    Hoch · 10.0 CVE-2026-54309 >= 2.26.0, < 2.26.2, < 2.25.7 2.26.2, 2.25.7
  30. n8n: Cross-Tenant Credential Takeover via Dynamic Credentials EE Endpoints
    Hoch · 9.9 CVE-2026-54305 < 1.123.55, >= 2.26.0, < 2.26.2, >= 2.0.0-rc.0, < 2.25.7 1.123.55, 2.26.2, 2.25.7
  31. n8n: Credential Exfiltration via Permission Bypass
    Hoch · 9.6 CVE-2026-54307 < 1.123.55, >= 2.26.0, < 2.26.2, >= 2.0.0-rc.0, < 2.25.7 1.123.55, 2.26.2, 2.25.7
  32. n8n: Stored XSS in Chat Trigger Node
    Hoch · 7.6 CVE-2026-54302 < 1.123.55, >= 2.26.0, < 2.26.2, >= 2.0.0-rc.0, < 2.25.7 1.123.55, 2.26.2, 2.25.7
  33. n8n: Microsoft SQL Node Prototype Pollution
    Hoch · 8.5 CVE-2026-54312 < 2.24.0 2.24.0
  34. n8n: Same-Origin XSS in Respond to Webhook Node
    Hoch · 7.6 CVE-2026-54301 < 1.123.55, >= 2.26.0, < 2.26.2, >= 2.0.0-rc.0, < 2.25.7 1.123.55, 2.26.2, 2.25.7
  35. n8n: Python sandbox escape
    Hoch · 8.5 CVE-2026-49444 < 1.123.48, >= 2.22.0, < 2.22.4, >= 2.0.0-rc.0, < 2.21.8 1.123.48, 2.22.4, 2.21.8
  36. n8n Has a Cross-user Authorization Bypass in Dynamic Credential OAuth Endpoints
    Hoch · 8.1 CVE-2026-45732 < 1.123.43, >= 2.21.0, < 2.21.1, >= 2.0.0-rc.0, < 2.20.7 1.123.43, 2.21.1, 2.20.7
  37. n8n Has a Source Control Pull SQL Injection
    Hoch · 9.0 CVE-2026-44792 < 1.123.43, >= 2.21.0, < 2.21.1, >= 2.0.0-rc.0, < 2.20.7 1.123.43, 2.21.1, 2.20.7
  38. n8n Has an XML Node Prototype Pollution Patch Bypass
    Kritisch · 9.9 CVE-2026-44791 < 1.123.43, >= 2.21.0, < 2.22.1, >= 2.0.0-rc.0, < 2.20.7 1.123.43, 2.22.1, 2.20.7
  39. n8n Has an Arbitrary File Read via Git Node
    Kritisch · 8.8 CVE-2026-44790 < 1.123.43, >= 2.21.0, < 2.22.1, >= 2.0.0-rc.0, < 2.20.7 1.123.43, 2.22.1, 2.20.7
  40. n8n: HTTP Request Node Pagination Prototype Pollution to RCE
    Kritisch · 9.9 CVE-2026-44789 < 1.123.43, >= 2.21.0, < 2.22.1, >= 2.0.0-rc.0, < 2.20.7 1.123.43, 2.22.1, 2.20.7
  41. n8n has XML Node Prototype Pollution that to RCE
    Kritisch · 9.9 CVE-2026-42232 >= 2.18.0, < 2.18.1, >= 2.17.0, < 2.17.4, < 1.123.32 2.18.1, 2.17.4, 1.123.32
  42. n8n has Prototype Pollution in XML Webhook Body Parser that Leads to RCE
    Kritisch · 10.0 CVE-2026-42231 < 1.123.32, >= 2.18.0, < 2.18.1, >= 2.17.0, < 2.17.4 1.123.32, 2.18.1, 2.17.4
  43. n8n Vulnerable to XSS via MCP OAuth client
    Hoch · 8.2 CVE-2026-42235 < 1.123.32, >= 2.18.0, < 2.18.1, >= 2.17.0, < 2.17.4 1.123.32, 2.18.1, 2.17.4
  44. n8n's Credential Authorization Bypass in dynamic-node-parameters Allows Foreign API Key Replay
    Hoch · 8.5 CVE-2026-42226 >= 2.17.0, < 2.17.5, < 1.123.33 2.17.5, 1.123.33
  45. n8n has a Python Task Runner Sandbox Escape Vulnerability
    Hoch · 7.5 CVE-2026-42234 < 1.123.32, >= 2.18.0, < 2.18.1, >= 2.17.0, < 2.17.4 1.123.32, 2.18.1, 2.17.4
  46. n8n Vulnerable to Unauthenticated Denial of Service via MCP Client Registration
    Hoch · 7.5 CVE-2026-42236 < 1.123.32, >= 2.18.0, < 2.18.1, >= 2.0.0, < 2.17.4 1.123.32, 2.18.1, 2.17.4
  47. n8n has SQL Injection in Data Table Node via orderByColumn Expression
    Hoch · 9.9 CVE-2026-33713 < 1.123.26, >= 2.14.0, < 2.14.1, >= 2.0.0-rc.0, < 2.13.3 1.123.26, 2.14.1, 2.13.3
  48. n8n: Prototype Pollution in XML and GSuiteAdmin node parameters lead to RCE
    Kritisch · 9.9 CVE-2026-33696 >= 2.14.0, < 2.14.1, >= 2.0.0-rc.0, < 2.13.3, < 1.123.27 2.14.1, 2.13.3, 1.123.27
  49. n8n Has External Secrets Authorization Bypass in Credential Saving
    Hoch · 6.3 CVE-2026-33722 < 1.123.23, >= 2.0.0-rc.0, < 2.6.4 1.123.23, 2.6.4
  50. n8n: LDAP Email-Based Account Linking Allows Privilege Escalation and Account Takeover
    Hoch · 8.2 CVE-2026-33665 >= 2.0.0-rc.0, < 2.4.0, < 1.121.0 2.4.0, 1.121.0
  51. n8n is Vulnerable to Credential Theft via Name-Based Resolution and Permission Checker Bypass in Community Edition
    Hoch · 9.9 CVE-2026-33663 < 1.123.27, >= 2.14.0, < 2.14.1, >= 2.0.0-rc.0, < 2.13.3 1.123.27, 2.14.1, 2.13.3
  52. n8n has Multiple Remote Code Execution Vulnerabilities in Merge Node AlaSQL SQL Mode
    Kritisch · 9.9 CVE-2026-33660 >= 2.14.0, < 2.14.1, >= 2.0.0-rc.0, < 2.13.3, < 1.123.27 2.14.1, 2.13.3, 1.123.27
  53. n8n has In-Process Memory Disclosure in its Task Runner
    Hoch · 6.5 CVE-2026-27496 < 1.123.22, >= 2.10.0, < 2.10.1, >= 2.0.0-rc.0, < 2.9.3 1.123.22, 2.10.1, 2.9.3
  54. n8n Vulnerable to Stored XSS via Various Nodes
    Hoch · 5.4 CVE-2026-27578 < 1.123.22, >= 2.0.0, < 2.9.3, >= 2.10.0, < 2.10.1 1.123.22, 2.9.3, 2.10.1
  55. n8n: Expression Sandbox Escape Leads to RCE
    Kritisch · 9.9 CVE-2026-27577 < 1.123.22, >= 2.0.0, < 2.9.3, >= 2.10.0, < 2.10.1 1.123.22, 2.9.3, 2.10.1
  56. n8n has Arbitrary Command Execution via File Write and Git Operations
    Kritisch · 8.5 CVE-2026-27498 < 1.123.8, >= 2.0.0, < 2.2.0 1.123.8, 2.2.0
  57. n8n has Potential Remote Code Execution via Merge Node
    Kritisch · 9.9 CVE-2026-27497 < 1.123.22, >= 2.0.0, < 2.9.3, >= 2.10.0, < 2.10.1 1.123.22, 2.9.3, 2.10.1
  58. n8n has a Sandbox Escape in its JavaScript Task Runner
    Kritisch CVE-2026-27495 < 1.123.22, >= 2.0.0, < 2.9.3, >= 2.10.0, < 2.10.1 1.123.22, 2.9.3, 2.10.1
  59. n8n has Arbitrary File Read via Python Code Node Sandbox Escape
    Hoch · 9.9 CVE-2026-27494 < 1.123.22, >= 2.0.0, < 2.9.3, >= 2.10.0, < 2.10.1 1.123.22, 2.9.3, 2.10.1
  60. n8n has Unauthenticated Expression Evaluation via Form Node
    Kritisch · 9.0 CVE-2026-27493 < 1.123.22, >= 2.0.0, < 2.9.3, >= 2.10.0, < 2.10.1 1.123.22, 2.9.3, 2.10.1
  61. n8n has a Python sandbox escape
    Kritisch · 9.9 CVE-2026-25115 < 2.4.8 2.4.8
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