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CVE-2026-82447 is a sandbox-escape vulnerability in Skyvern versions before 1.0.45. TextPromptBlock performs two Jinja rendering passes: an initial pass in a sandboxed Jinja environment followed by a second pass in an unsandboxed environment. Template syntax supplied through attacker-controlled workflow parameters or an upstream block's output can survive the first rendering stage and be evaluated during the unsandboxed pass, enabling arbitrary code execution in the Skyvern server process.
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A sandbox-escape and arbitrary-code-execution vulnerability in Skyvern TextPromptBlock versions before 1.0.45. Double rendering of prompts—first in a sandboxed Jinja environment and then in an unsandboxed environment—allows attacker-controlled Jinja syntax supplied through workflow parameters or upstream block output to execute with the server process's privileges.
A high-severity sandbox-escape and arbitrary-code-execution vulnerability in Skyvern TextPromptBlock prior to version 1.0.45. Double rendering of Jinja prompts transitions attacker-controlled template content from a sandboxed environment into an unsandboxed one, allowing code execution with the server process's privileges.
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