← Vulnerability feed

Vulnerability record · CVE-2026-77079 · published 20 August 2026

CVE-2026-77079: N8n insecure direct object reference vulnerability

N8n · N8n

n8n before 2.34.1 and 2.33.4 contains an authorization bypass in the custom project role deletion (reassignment) path. When deleting a custom project role with a reassignment target, the code validated only that the target role existed and was project-scoped, performing no project-level authorization check. A user holding only the narrow role:manageProject global scope could delete any custom project role in use on the instance and reassign its holders (including themselves) to the built-in project:admin role, gaining full administrative control of projects they had no legitimate access to.

7.4 CVSS 4.0 High EPSS 0.45% · top 63.3% CWE-639 · Insecure direct object reference
7.4CVSS 4.0 base score
0.45%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
1 Sep 2026Last modified by NVD

Description

n8n before 2.34.1 and 2.33.4 contains an authorization bypass in the custom project role deletion (reassignment) path. When deleting a custom project role with a reassignment target, the code validated only that the target role existed and was project-scoped, performing no project-level authorization check. A user holding only the narrow role:manageProject global scope could delete any custom project role in use on the instance and reassign its holders (including themselves) to the built-in project:admin role, gaining full administrative control of projects they had no legitimate access to.

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/VA:L/SC:H/SI:H/SA:H/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:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/n8n-io/n8n/security/advisories/GHSA-xhmh-8fgr-xqhj MitigationVendor Advisory
https://www.vulncheck.com/advisories/n8n-before-authorization-bypass-via-custom-role-deletion Third Party Advisory

Track CVE-2026-77079 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.8CVE-2025-68613n8n workflow expression evaluation RCE for authenticated usersn8n versions from 0.211.0 before 1.120.4, 1.121.1, and 1.122.0 evaluate user-supplied workflow expressions in an execution context that is not suffic…KEVEPSS 99%analysed10.0CVE-2026-21858n8n form workflows allow unauthenticated file accessn8n versions from 1.65.0 up to but not including 1.121.0 fail to properly validate input in certain form-based workflows, letting an attacker read fi…EPSS 78%analysed9.9CVE-2026-1470N8n vulnerabilityn8n contains a critical Remote Code Execution (RCE) vulnerability in its workflow Expression evaluation system. Expressions supplied by authenticated…EPSS 21%9.9CVE-2026-0863N8n code injection vulnerabilityUsing string formatting and exception handling, an attacker may bypass n8n's python-task-executor sandbox restrictions and run arbitrary unrestricted…EPSS 9.4%9.9CVE-2026-21877N8n code injection vulnerabilityn8n is an open source workflow automation platform. In versions 0.121.2 and below, an authenticated attacker may be able to execute malicious code us…EPSS 5.4%9.9CVE-2025-68668N8n vulnerabilityn8n is an open source workflow automation platform. From version 1.0.0 to before 2.0.0, a sandbox bypass vulnerability exists in the Python Code Node…EPSS 13%9.5CVE-2026-27493N8n code injection vulnerabilityn8n is an open source workflow automation platform. Prior to versions 2.10.1, 2.9.3, and 1.123.22, a second-order expression injection vulnerability …EPSS 1.6%9.4CVE-2026-44789N8n prototype pollution vulnerabilityn8n is an open source workflow automation platform. Prior to 1.123.43, 2.22.1, and 2.20.7, an authenticated user with permission to create or modify …EPSS 0.53%

Source: NIST National Vulnerability Database (record CVE-2026-77079), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.