Threat Intelligence / CVE / CVE-2026-56777

CVE-2026-56777

CVSS 5 (MEDIUM) · EPSS 0.3% · Priority 3.2/10 · Published 2026-06-30

As of 2026-07-01, CVE-2026-56777 is a CVSS 5 (MEDIUM-severity) vulnerability. EPSS exploitation probability 0.3%. Threadlinqs Intelligence tracks 0 threats exploiting it.

Last updated: 2026-07-01

n8n before 2.25.7 and 2.26.x before 2.26.2 contains an abstract syntax tree (AST) security validator bypass in the Python Code node. An authenticated user with permission to create or modify workflows containing a Python Code node can bypass the validator and access the task executor module namespace. The issue only affects self-hosted instances where the Python Task Runner is enabled; where N8N_BLOCK_RUNNER_ENV_ACCESS is configured to allow it, this can disclose environment variables accessible to the task runner process.

CVSS v3 vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N

Weaknesses (CWE)

CWE-184

References

Full detection coverage & IOCs for threats exploiting CVE-2026-56777 are available via the Threadlinqs MCP server (Purple tier). View plans →

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Enriched from CVE.org, NVD (this product uses the NVD API but is not endorsed or certified by the NVD), FIRST EPSS, CISA KEV, and GitHub Security Advisories.