CVE-2026-123783
Published:November 06, 2026
Updated:November 09, 2026
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.
Affected Packages
https://github.com/Skyvern-AI/skyvern.git (GITHUB):
Affected version(s) >=v1.0.48 <v1.0.57Fix Suggestion:
Update to version v1.0.57skyvern (PYTHON):
Affected version(s) >=1.0.48 <1.0.57Fix Suggestion:
Update to version 1.0.57Related Resources (9)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
8.8
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Incomplete List of Disallowed Inputs
EPSS
Base Score:
0.56