CVE-2026-54305Network attack vector

Cross-tenant credential takeover via missing ownership checks

Published Jun 23, 2026 · Updated Jun 23, 2026

Improper access control in affected n8n releases allows remote authenticated users to take over OAuth credentials across tenants. The Dynamic Credentials EE endpoints accept any authenticated session and omit ownership or scope checks before listing, authorizing, or revoking a target workflow's credentials. Exploitation requires an Enterprise instance with Dynamic Credentials enabled; it exposes credential metadata, replaces or revokes tokens, and makes workflows run under an attacker-controlled OAuth identity.

CVSS severity8.9
High
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in affected n8n releases allows remote authenticated users to take over OAuth credentials across tenants. The Dynamic Credentials EE endpoints accept any authenticated session and omit ownership or scope checks before listing, authorizing, or revoking a target workflow's credentials. Exploitation requires an Enterprise instance with Dynamic Credentials enabled; it exposes credential metadata, replaces or revokes tokens, and makes workflows run under an attacker-controlled OAuth identity.

The record

CVE
CVE-2026-54305
Published
Jun 23, 2026
Updated
Jun 23, 2026
Vendor
n8n
Product
n8n
Classifications
CWE-200, CWE-284, T1098
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 23, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.123.55
  2. Affected versionversion=>= 2.0.0-rc.0, < 2.25.7
  3. Affected versionversion=>= 2.26.0, < 2.26.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

n8n · n8nversion=< 1.123.55; version=>= 2.0.0-rc.0, < 2.25.7; version=>= 2.26.0, < 2.26.2

Published CVSS scores

9.9NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L
8.9n8nCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
CWE-284Improper Access Control
T1098Account Manipulation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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