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| Vulnerability ID | VCID-63pn-hppa-13bx |
| Aliases |
CVE-2026-45732
GHSA-6h4j-wcr9-2vg7 |
| Summary | n8n Has a Cross-user Authorization Bypass in Dynamic Credential OAuth Endpoints ## Impact 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 issue affects instances where credentials are shared with other users or across projects. ## Patches The issue has been fixed in n8n versions 1.123.43, 2.20.7, and 2.21.1. Users should upgrade to one of these versions or later to remediate the vulnerability. ## Workarounds If upgrading is not immediately possible, administrators should consider the following temporary mitigations: - Restrict credential sharing to fully trusted users only. - Audit shared credentials for unexpected OAuth token changes and revoke any tokens that may have been replaced. These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures. --- n8n has adopted CVSS 4.0 as primary score for all security advisories. CVSS 3.1 vector strings are provided for backwards compatibility. CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N |
| Status | Published |
| Exploitability | 0.5 |
| Weighted Severity | 8.0 |
| Risk | 4.0 |
| Affected and Fixed Packages | Package Details |
| System | Score | Found at |
|---|---|---|
| epss | 0.00043 | https://api.first.org/data/v1/epss?cve=CVE-2026-45732 |
| cvssv3.1_qr | HIGH | https://github.com/advisories/GHSA-6h4j-wcr9-2vg7 |
| cvssv4 | 8.3 | https://github.com/n8n-io/n8n |
| generic_textual | HIGH | https://github.com/n8n-io/n8n |
| cvssv3.1_qr | HIGH | https://github.com/n8n-io/n8n/security/advisories/GHSA-6h4j-wcr9-2vg7 |
| cvssv4 | 8.3 | https://github.com/n8n-io/n8n/security/advisories/GHSA-6h4j-wcr9-2vg7 |
| generic_textual | HIGH | https://github.com/n8n-io/n8n/security/advisories/GHSA-6h4j-wcr9-2vg7 |
| Reference id | Reference type | URL |
|---|---|---|
| https://api.first.org/data/v1/epss?cve=CVE-2026-45732 | ||
| https://github.com/n8n-io/n8n | ||
| https://github.com/n8n-io/n8n/security/advisories/GHSA-6h4j-wcr9-2vg7 | ||
| GHSA-6h4j-wcr9-2vg7 | https://github.com/advisories/GHSA-6h4j-wcr9-2vg7 |
| Attack Vector (AV) | Attack Complexity (AC) | Attack Requirements (AT) | Privileges Required (PR) | User Interaction (UI) | Vulnerable System Impact Confidentiality (VC) | Vulnerable System Impact Integrity (VI) | Vulnerable System Impact Availability (VA) | Subsequent System Impact Confidentiality (SC) | Subsequent System Impact Integrity (SI) | Subsequent System Impact Availability (SA) |
|---|---|---|---|---|---|---|---|---|---|---|
network adjacent local physical |
low high |
none present |
none low high |
none passive active |
high low none |
high low none |
high low none |
high low none |
high low none |
high low none |
| Attack Vector (AV) | Attack Complexity (AC) | Attack Requirements (AT) | Privileges Required (PR) | User Interaction (UI) | Vulnerable System Impact Confidentiality (VC) | Vulnerable System Impact Integrity (VI) | Vulnerable System Impact Availability (VA) | Subsequent System Impact Confidentiality (SC) | Subsequent System Impact Integrity (SI) | Subsequent System Impact Availability (SA) |
|---|---|---|---|---|---|---|---|---|---|---|
network adjacent local physical |
low high |
none present |
none low high |
none passive active |
high low none |
high low none |
high low none |
high low none |
high low none |
high low none |
| Percentile | 0.13719 |
| EPSS Score | 0.00043 |
| Published At | June 12, 2026, 12:55 p.m. |
| Date | Actor | Action | Source | VulnerableCode Version |
|---|---|---|---|---|
| 2026-06-12T07:52:07.988509+00:00 | GithubOSV Importer | Import | https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-6h4j-wcr9-2vg7/GHSA-6h4j-wcr9-2vg7.json | 38.6.0 |