{"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"}}]}}

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{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.0.56]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "skyvern", "source": "cna", "vendor": "Skyvern-AI"}, "product": "skyvern", "vendor": "skyvern-ai"}], "created": "2026-11-06T16:45:05.629535+00:00", "updated": "2026-11-06T19:15:07.762176+00:00", "vendors": ["skyvern-ai", "skyvern-ai$PRODUCT$skyvern"]}