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Advisories

Skyvern before 1.0.45 Sandbox Escape via TextPromptBlock

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severity
high
date
Affecting

  • skyvern >= 0.2.1, < 1.0.45

CWE
  • CWE-1336 Improper Neutralization of Special Elements Used in a Template Engine
CVSS
8.7
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Credit
hayato1121
Description
Skyvern before 1.0.45 contains a sandbox escape vulnerability in TextPromptBlock that renders prompts twice, first through a sandboxed Jinja environment and then through an unsandboxed environment. Attackers can inject malicious Jinja template syntax through workflow parameters or upstream block output to execute arbitrary code with server process privileges.

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