n8n Expression Sandbox Escape Remote Code Execution
CVE-2026-27577 is a critical expression sandbox escape vulnerability in n8n's workflow expression evaluation system. According to the provided content, the issue affects versions prior to 2.10.1, 2.9.3, and 1.123.22 and was identified as an additional exploit path following CVE-2025-68613. The flaw is described as a missing case in the AST rewriter that allows process to pass through untransformed during expression handling. As a result, an authenticated user who has permission to create or modify workflows can place crafted expressions in workflow parameters and escape the intended expression sandbox, leading to unintended system command execution on the host running n8n.
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Exploits
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Recent activity
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A critical n8n vulnerability in the workflow expression evaluation system described as an additional exploit discovered following CVE-2025-68613.
An expression sandbox escape vulnerability in n8n that can allow an authenticated user with workflow creation or modification permissions to achieve remote code execution on the host.
The version that knows your environment.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.