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 instea

mediumCVSS 6.4CVE-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.

Details

Source: NVD Recent CVEs (US · database · site)
Severity: medium — CVSS 6.4
Published: 2026-07-08
Last updated: 2026-07-08
Exploitation: Not in CISA KEV at last sync

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-56778

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-567780.17% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 7% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-56778	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

high[UPDATE] [high] n8n: Multiple vulnerabilitiescert-bund

Recent advisories for n8n

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

unknownCVE-2026-58661: n8n before 2.28.0 (and before 1.123.58 on the 1.x branch) contains a disk space exhaustion vul…nvd · 2026-07-10
mediumCVE-2026-56354: n8n before 1.123.24, 2.10.4, and 2.12.0 (across its 1.x and 2.x branches) contains cross-site …nvd · 2026-07-10
high[UPDATE] [high] n8n: Multiple vulnerabilitiescert-bund · 2026-07-10
unknownCVE-2026-59209: n8n is an open source workflow automation platform. Prior to 1.123.61, 2.27.4, and, 2.28.1, an…nvd · 2026-07-09
mediumCVE-2026-59208: n8n is an open source workflow automation platform. Prior to 2.27.4 and from 2.28.0 prior to 2…nvd · 2026-07-09
mediumCVE-2026-59207: n8n is an open source workflow automation platform. Prior to 2.27.4 and 2.28.1, the AI Agents …nvd · 2026-07-09