CVE-2026-56775Network attack vector

Viewer-level workflow mutation via read-scope authorization

Published Jul 8, 2026 · Updated Jul 8, 2026

Incorrect authorization in n8n before 1.123.55, 2.25.7, and 2.26.2 allows remote authenticated users to alter evaluation test runs. Three mutating evaluation test-run controller endpoints authorize start, cancel, and delete operations with workflow:read instead of workflow:execute. Exploitation requires Advanced Permissions with projects and a project:viewer account, and permits unauthorized run creation, interruption, and record deletion.

CVSS severity5.3
Medium
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in n8n before 1.123.55, 2.25.7, and 2.26.2 allows remote authenticated users to alter evaluation test runs. Three mutating evaluation test-run controller endpoints authorize start, cancel, and delete operations with workflow:read instead of workflow:execute. Exploitation requires Advanced Permissions with projects and a project:viewer account, and permits unauthorized run creation, interruption, and record deletion.

The record

CVE
CVE-2026-56775
Published
Jul 8, 2026
Updated
Jul 8, 2026
Vendor
n8n
Product
n8n
Classifications
CWE-863
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 8, 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=0 <1.123.55
  2. Affected versionversion=0 <2.25.7
  3. Affected versionversion=0 <2.26.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

n8n · n8nversion=0 <1.123.55; version=0 <2.25.7; version=0 <2.26.2

Published CVSS scores

5.3n8nCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:L/SA:N
5.3VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
5.4VulnCheckCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A: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-863Incorrect Authorization

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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