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CVE-2026-82447— Skyvern before 1.0.45 Sandbox Escape via TextPromptBlock

Quick assessment

Affected
Skyvern-AI skyvern
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Skyvern 1.0.45 之前版本中存在一个沙箱逃逸漏洞，位于 TextPromptBlock 中。该漏洞源于提示词（prompt）被渲染两次：首先通过一个沙箱化的 Jinja 环境进行渲染，随后又通过一个未沙箱化的环境进行第二次渲染。攻击者可以通过工作流参数或上游区块的输出注入恶意的 Jinja 模板语法，从而以服务器进程的权限执行任意代码。

CVSS 8.8 · High

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-82447

Vulnerability Information
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Vulnerability Title
Skyvern before 1.0.45 Sandbox Escape via TextPromptBlock
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1336
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Skyvern-AI skyvern 0.2.1 ~ 1.0.45 -

II. Public POCs for CVE-2026-82447

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III. Intelligence Information for CVE-2026-82447

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Patches & Fixes for CVE-2026-82447 (1)

Vendor Advisories for CVE-2026-82447 (1)

Other References for CVE-2026-82447 (1)

Other References for CVE-2026-82447 (1)

IV. Related Vulnerabilities

Same product: skyvern
Same weakness: CWE-1336

V. Comments for CVE-2026-82447

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