{"id":"CVE-2026-82447","title":"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","summary":"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 te…","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-1336"],"published":"2026-08-29","updated":"2026-09-23","sourceUpdated":"2026-09-23T17:17:46.140","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-82447","references":[{"url":"https://github.com/Skyvern-AI/skyvern","label":"disclosure@vulncheck.com"},{"url":"https://github.com/Skyvern-AI/skyvern/blob/v1.0.44/skyvern/forge/sdk/prompting.py","label":"disclosure@vulncheck.com"},{"url":"https://github.com/Skyvern-AI/skyvern/blob/v1.0.44/skyvern/forge/sdk/workflow/models/block.py","label":"disclosure@vulncheck.com"},{"url":"https://github.com/Skyvern-AI/skyvern/commit/d723de621d5b3a340f3cc4d5b46bfe40a9a3124e","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/skyvern-before-1.0.45-sandbox-escape-via-textpromptblock","label":"disclosure@vulncheck.com"}],"tags":["nvd","cve.org"],"epss":0.00775,"epssPercentile":0.53829,"ingestedAt":"2026-08-30T07:49:08.340Z","vendor":"Skyvern-AI","product":"skyvern","affected":["skyvern >= 0.2.1 < 1.0.45"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-09-01T02:06:30.299334Z"},"slug":"CVE-2026-82447","body":"## Overview\n\nSkyvern 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":49,"depthScoreParts":{"impact":48.4,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[]}