Cyber Resilience

CVE-2026-45732

High

Published: 23 June 2026

Published
23 June 2026
Modified
26 June 2026
KEV Added
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Patch
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CVSS Score v4 8.3 CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/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
EPSS Score 0.0032 23.3th percentile
Risk Priority 55 floored blend · peak EPSS

Summary

CVE-2026-45732 is a high-severity Authorization Bypass Through User-Controlled Key (CWE-639) vulnerability in N8N N8N. Its CVSS base score is 8.3 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Cloud Accounts (T1078.004); ranked at the 23.3th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

OWASP Top 10 for Web (2025)

A01:2025 Broken Access Control

EU & UK References

Vulnerability details

n8n is an open source workflow automation platform. Prior to 1.123.43, 2.22.1, and 2.20.7, the OAuth1 and OAuth2 credential reconnect endpoints authorized access using credential:read rather than credential:update. An authenticated user with read-only access to a shared credential could initiate…

more

an OAuth reconnect flow and overwrite the stored token material for that credential with tokens bound to an external account they control. Workflows relying on the affected credential would subsequently execute under the attacker's OAuth identity, enabling data exfiltration to attacker-controlled external services and persistent takeover of shared integrations. This vulnerability is fixed in 1.123.43, 2.22.1, and 2.20.7.

CWE(s)
CWE-639

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1078.004 Cloud Accounts Stealth
Valid accounts in cloud environments may allow adversaries to perform actions to achieve Initial Access, Persistence, Privilege Escalation, or Defense Evasion.
attack.mitre.org →
T1528 Steal Application Access Token Credential Access
Adversaries can steal application access tokens as a means of acquiring credentials to access remote systems and resources.
attack.mitre.org →
T1567.002 Exfiltration to Cloud Storage Exfiltration
Adversaries may exfiltrate data to a cloud storage service rather than over their primary command and control channel.
attack.mitre.org →
Why these techniques?

Authz bypass on credential endpoints directly enables token replacement (T1528), subsequent use of hijacked cloud OAuth identities (T1078.004), and exfiltration via affected workflows (T1567.002).

Confidence: MEDIUM · MITRE ATT&CK Enterprise v19.0

Affected Assets

n8n
n8n
≤ 1.123.43 · 2.0.0 — 2.20.7 · 2.21.0 — 2.22.1

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

AC-24 Access Control Decisions
addresses: CWE-639

Per-request decision making makes it harder to bypass authorization using user-controlled keys without proper validation in the decision process.

AC-3 Access Enforcement
addresses: CWE-639

Consistent enforcement of approved authorizations makes bypassing via user-controlled keys ineffective.

References