GHSA-2555-vffj-g73cHighCVSS 8.8
Skyvern through 1.0.56 contains a sandbox bypass vulnerability that allows authenticated users to...
🔗 CVE IDs covered (1)
📋 Description
Skyvern through 1.0.56 contains a sandbox bypass vulnerability that allows authenticated users to execute code by reconstructing functions from raw bytecode with types.CodeType. Attackers can deploy scripts that evade the is_safe_script_code AST denylist and import blocked modules such as subprocess or socket to run code in the Skyvern server process.
🔗 References (9)
- https://nvd.nist.gov/vuln/detail/CVE-2026-123783
- https://github.com/Skyvern-AI/skyvern/issues/8927
- https://github.com/Skyvern-AI/skyvern/pull/8937
- https://github.com/Skyvern-AI/skyvern/commit/31a64c1a4b5dfaf1e76a7164845e10f2d68248dc
- https://github.com/Skyvern-AI/skyvern
- https://github.com/Skyvern-AI/skyvern/blob/v1.0.56/skyvern/forge/sdk/workflow/code_block_safety.py#L106-L142
- https://github.com/Skyvern-AI/skyvern/blob/v1.0.56/skyvern/forge/sdk/workflow/service.py#L1509-L1511
- https://www.vulncheck.com/advisories/skyvern-through-1.0.56-script-sandbox-bypass-via-types-codetype-bytecode
- https://github.com/advisories/GHSA-2555-vffj-g73c