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CVE-2026-82447

Skyvern before 1.0.45 Sandbox Escape via TextPromptBlock

CVSS 4.0 8.7 HIGHCVSS 3.1 8.8 HIGHCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-82447

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-82447

Published

skyvern

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Skyvern-AI",
                    "product": "skyvern",
                    "defaultStatus": "unaffected",
                    "packageURL": "pkg:pypi/skyvern",
                    "versions": [
                        {
                            "version": "0.2.1",
                            "lessThan": "1.0.45",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON