CVE-2026-123783 (GCVE-0-2026-123783)

Vulnerability from cvelistv5 – Published: 2026-11-06 15:00 – Updated: 2026-11-06 17:28
VLAI
Title
Skyvern through 1.0.56 Script Sandbox Bypass via types.CodeType Bytecode
Summary
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.
Severity
8.7 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-06 17:27 UTC
CWE
  • CWE-184 - Incomplete List of Disallowed Inputs
Assigner
VulnCheck CNA
References
Impacted products
Vendor Product Version
Skyvern-AI skyvern Affected: 0 , ≤ 1.0.56 (semver)
Create a notification for this product.
Date Public
2026-10-16 00:00
Credits
George Chen Aaron Perez
Show details on NVD website
To clipboard 

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