How severe is CVE-2026-56778?

CVE-2026-56778 has a CVSS 3.x base score of 6.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-56778 being actively exploited?

It is not currently listed in CISA's Known Exploited Vulnerabilities catalog, and no EPSS exploit-prediction score is available yet.

What products are affected by CVE-2026-56778?

CVE-2026-56778 affects N8n. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-56778?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2026-56778 published?

CVE-2026-56778 was published on 2026-07-08.

CVE-2026-56778

CVE-2026-56778 is a medium-severity vulnerability in N8n with a CVSS 3.x base score of 6.4. The underlying weakness is classified as CWE-863.

Key facts

Severity: Medium (CVSS 3.x base score 6.4)
CVSS v4: 5.3
Actively exploited: Not listed in CISA KEV
Weakness: CWE-863
Affected product: N8n
Published: 2026-07-08
Last modified: 2026-07-08

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2026-56778?: CVE-2026-56778 has a CVSS 3.x base score of 6.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-56778 being actively exploited?: It is not currently listed in CISA's Known Exploited Vulnerabilities catalog, and no EPSS exploit-prediction score is available yet.
What products are affected by CVE-2026-56778?: CVE-2026-56778 affects N8n. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-56778?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-56778 published?: CVE-2026-56778 was published on 2026-07-08.

References

Affected products (1)

cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:*

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