CVE-2026-45732

n8n: Cross-user Authorization Bypass in Dynamic Credential OAuth Endpoints

HIGH

8.1

CVSS Score

Published: June 23, 2026 at 03:52 PM UTC

Updated: October 26, 2026 at 11:10 AM UTC

2 products affected across 2 vendorsN8NN8N

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Severity

HIGH8.1

Exploit prediction

EPSS 0.4%

SSVC

No known exploit

Description

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 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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

N8N · N8Nnpm

95%

v < 1.123.432.0.0 ≤ v < 2.20.72.21.0 ≤ v < 2.22.1

Affected range stops below 1.123.43, so it looks safe — our inference, not a vendor statement

Affected range stops below 2.20.7, so it looks safe — our inference, not a vendor statement

Affected range stops below 2.22.1, so it looks safe — our inference, not a vendor statement

N8N · N8N Io

90%

v < 1.123.43

Affected range stops below 1.123.43, so it looks safe — our inference, not a vendor statement

Affected range stops below 2.20.7, so it looks safe — our inference, not a vendor statement

Affected range stops below 2.21.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://github.com/n8n-io/n8n/security/advisories/GHSA-6h4j-wcr9-2vg7

References (1)

x_refsource_CONFIRMMitigationVendor Advisory

Source: cverecord

https://github.com/n8n-io/n8n/security/advisories/GHSA-6h4j-wcr9-2vg7

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.1HIGH[email protected]

Attack Vector: NETWORK
Complexity: LOW
Privileges: LOW
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: HIGH
Integrity: HIGH
Availability: NONE

Vector?

Quick Info

StatusANALYZED

CWE

CWE-639

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