{"id":"CVE-2026-123783","summary":"Skyvern through 1.0.56 Script Sandbox Bypass via types.CodeType Bytecode","details":"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.","modified":"2026-11-07T02:46:55.369017679Z","published":"2026-11-06T15:00:59.895Z","database_specific":{"cwe_ids":["CWE-184"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/123xxx/CVE-2026-123783.json","cna_assigner":"VulnCheck"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/123xxx/CVE-2026-123783.json"},{"type":"PACKAGE","url":"https://github.com/Skyvern-AI/skyvern"},{"type":"ARTICLE","url":"https://github.com/Skyvern-AI/skyvern/blob/v1.0.56/skyvern/forge/sdk/workflow/code_block_safety.py#L106-L142"},{"type":"ARTICLE","url":"https://github.com/Skyvern-AI/skyvern/blob/v1.0.56/skyvern/forge/sdk/workflow/service.py#L1509-L1511"},{"type":"FIX","url":"https://github.com/Skyvern-AI/skyvern/commit/31a64c1a4b5dfaf1e76a7164845e10f2d68248dc"},{"type":"REPORT","url":"https://github.com/Skyvern-AI/skyvern/issues/8927"},{"type":"FIX","url":"https://github.com/Skyvern-AI/skyvern/pull/8937"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-123783"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/skyvern-through-1.0.56-script-sandbox-bypass-via-types-codetype-bytecode"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/skyvern-ai/skyvern","events":[{"introduced":"0"},{"last_affected":"0bfb8317bc4b4a5913d1aabcdb73f66b11c538fa"},{"fixed":"31a64c1a4b5dfaf1e76a7164845e10f2d68248dc"}],"database_specific":{"extracted_events":[{"strategy":"StandardRange","range":[{"introduced":"0"},{"last_affected":"1.0.56"}],"source":"AFFECTED_FIELD"},{"range":[{"fixed":"31a64c1a4b5dfaf1e76a7164845e10f2d68248dc"}],"source":"REFERENCES_COMMIT"}]}}],"versions":["v1.0.56","v1.0.55","v1.0.54","v1.0.53","v1.0.52","v1.0.51","v1.0.50","v1.0.49","v1.0.48","v1.0.47","v1.0.46","v1.0.45","v1.0.44","v1.0.43","v1.0.42","v1.0.41","v1.0.40","v1.0.39","v1.0.38","v1.0.37","v1.0.36","v1.0.35","v1.0.34","v1.0.33","v1.0.32","v1.0.31","v1.0.30","v1.0.29","v1.0.28","v1.0.27","v1.0.26","v1.0.25","v1.0.24","v1.0.23","v1.0.22","v1.0.21","v1.0.20","v1.0.19","v1.0.18","v1.0.17","v1.0.16","v1.0.15","v1.0.14","v1.0.13","v1.0.12","v1.0.11","v1.0.10","v1.0.9","v1.0.8","v1.0.7","v1.0.6","v1.0.5","v1.0.4","v1.0.3","v1.0.2","v1.0.1","v1.0.0","v0.2.23","v0.2.22","v0.2.21","v0.2.20","v0.2.19","v0.2.18","v0.2.17","v0.2.16","v0.2.15","v0.2.14","v0.2.13","v0.2.12","v0.2.11","v0.2.10","v0.2.9","v0.2.8","v0.2.7","v0.2.6","v0.2.5","v0.2.4","v0.2.3","v0.2.2","v0.2.1","v0.1.85","v0.1.84","v0.1.83","v0.1.82","v0.1.81","v0.1.80","v0.1.79","v0.1.77","v0.1.76","v0.1.75","v0.1.73","v0.1.71","v0.1.68","v0.1.67","v0.1.66","v0.1.65","v0.1.64","v0.1.63","v0.1.62","v0.1.61","v0.1.60","v0.1.59","v0.1.58","v0.1.57","v0.1.56","v0.1.55","v0.1.54","v0.1.53","v0.1.52","v0.1.51","v0.1.50","v0.1.49","v0.1.48","v0.1.47","v0.1.46","v0.1.45","v0.1.44","v0.1.43","v0.1.42","v0.1.41","v0.1.40","v0.1.39","v0.1.38","v0.1.37","v0.1.36","v0.1.35","v0.1.34","v0.1.33","v0.1.32","v0.1.31","v0.1.30","v0.1.29","v0.1.28","v0.1.27","v0.1.26","v0.1.25","v0.1.24","v0.1.23","v0.1.22","v0.1.21","v0.1.20","v0.1.19","v0.1.18","v0.1.17","v0.1.16","v0.1.15","v0.1.14","v0.1.13","v0.1.12","v0.1.11","v0.1.10","v0.1.9","v0.1.8","v0.1.7","v0.1.6","v0.1.5","v0.1.4","v0.1.3","0.1.2","0.1.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-123783.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V4","score":"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"}]}