{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-123783","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","state":"PUBLISHED","assignerShortName":"VulnCheck","dateReserved":"2026-11-06T14:37:45.763Z","datePublished":"2026-11-06T15:00:59.895Z","dateUpdated":"2026-11-06T17:28:18.374Z"},"containers":{"cna":{"providerMetadata":{"orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","shortName":"VulnCheck","dateUpdated":"2026-11-06T15:00:59.895Z"},"datePublic":"2026-10-16T00:00:00.000Z","title":"Skyvern through 1.0.56 Script Sandbox Bypass via types.CodeType Bytecode","descriptions":[{"lang":"en","value":"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."}],"problemTypes":[{"descriptions":[{"lang":"en","description":"Incomplete List of Disallowed Inputs","cweId":"CWE-184","type":"CWE"}]}],"affected":[{"vendor":"Skyvern-AI","product":"skyvern","defaultStatus":"unaffected","packageURL":"pkg:pypi/skyvern","versions":[{"version":"0","status":"affected","versionType":"semver","lessThanOrEqual":"1.0.56"}]}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"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","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":8.7,"baseSeverity":"HIGH"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH","baseScore":8.8,"baseSeverity":"HIGH"}}],"references":[{"url":"https://github.com/Skyvern-AI/skyvern/issues/8927","tags":["issue-tracking"],"name":"GitHub Issue #8927"},{"url":"https://github.com/Skyvern-AI/skyvern","tags":["product"]},{"url":"https://github.com/Skyvern-AI/skyvern/pull/8937","name":"Fix pull request #8937","tags":["issue-tracking","patch"]},{"url":"https://github.com/Skyvern-AI/skyvern/commit/31a64c1a4b5dfaf1e76a7164845e10f2d68248dc","name":"Fix commit 31a64c1","tags":["patch"]},{"url":"https://github.com/Skyvern-AI/skyvern/blob/v1.0.56/skyvern/forge/sdk/workflow/code_block_safety.py#L106-L142","name":"Script AST denylist","tags":["technical-description"]},{"url":"https://github.com/Skyvern-AI/skyvern/blob/v1.0.56/skyvern/forge/sdk/workflow/service.py#L1509-L1511","name":"Script module execution","tags":["technical-description"]},{"name":"VulnCheck Advisory: Skyvern through 1.0.56 Script Sandbox Bypass via types.CodeType Bytecode","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/skyvern-through-1.0.56-script-sandbox-bypass-via-types-codetype-bytecode"}],"credits":[{"lang":"en","value":"George Chen","type":"finder"},{"lang":"en","value":"Aaron Perez","type":"remediation developer"}],"x_generator":{"engine":"vulncheck-endgame"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-11-06T17:27:54.295241Z","id":"CVE-2026-123783","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-11-06T17:28:18.374Z"}}]}}