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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.

PUBLISHED Reserved 2026-06-23 | Published 2026-07-08 | Updated 2026-07-08 | Assigner VulnCheck




MEDIUM: 5.3CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
MEDIUM: 6.4CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Problem types

Incorrect Authorization

Product status

Default status
unaffected

Any version before 2.26.2
affected

2.26.2 (semver)
unaffected

Default status
unaffected

Any version before 2.25.7
affected

2.25.7 (semver)
unaffected

Credits

ksw9722 reporter

References

github.com/...io/n8n/security/advisories/GHSA-h3jj-5f3v-3685 (GitHub Security Advisory (GHSA-h3jj-5f3v-3685)) vendor-advisory

www.vulncheck.com/...-in-public-api-execution-retry-endpoint (VulnCheck Advisory: n8n - Authorization Bypass in Public API Execution Retry Endpoint) third-party-advisory

cve.org (CVE-2026-56778)

nvd.nist.gov (CVE-2026-56778)

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