Is there a public exploit for CVE-2026-56778?

No public exploit for CVE-2026-56778 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-56778?

CVE-2026-56778 scores CVSS 5.3 (v4.0), rated medium. EPSS puts the chance of exploitation in the next 30 days at 0.3%.

What does CVE-2026-56778 affect?

CVE-2026-56778 affects n8n n8n. It is part of the AI and agent stack (n8n).

5.3 Medium

n8n before 2.25.7 and 2.26.x before 2.26.2 contains an authorization bypass in the Public API execution retry endpoint, which authorizes…

CVE-2026-56778

n8n before 2.25.7 and 2.26.x before 2.26.2 contains an authorization bypass in the Public API execution retry endpoint, which authorizes access using the workflow:read scope instead of workflow:execute. An authenticated user with read-only access to a shared workflow can use the Public API to retry executions of that workflow, bypassing the intended permission boundary between read and execute access. This affects instances where workflows are shared with other users or across projects.

Part of the AI stack

This affects n8n, in Agent frameworks.

Assessment

CVSS: 5.3 (v4.0)
Severity: Medium
EPSS: 0.3% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 8 July 2026
Last updated: 29 October 2026
Affected: n8n · n8n
Weakness: CWE-863
Assigner: disclosure@vulncheck.com

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

At the source

References

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