{"id":"CVE-2026-123783","aliases":[],"cve":{"records":[{"id":"CVE-2026-123783","source":"VulnCheck","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-11-06T14:37:45.763Z","published":"2026-11-06T15:00:59.895Z","modified":"2026-11-06T17:28:18.374Z"}],"publishers":[{"name":"VulnCheck","role":"CNA","organizationId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","modified":"2026-11-06T15:00:59.895Z"},{"name":"CISA-ADP","role":"ADP","organizationId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","modified":"2026-11-06T17:28:18.374Z"}],"references":[{"url":"https://github.com/Skyvern-AI/skyvern/issues/8927","tags":["issue-tracking"],"source":"VulnCheck"},{"url":"https://github.com/Skyvern-AI/skyvern","tags":["product"],"source":"VulnCheck"},{"url":"https://github.com/Skyvern-AI/skyvern/pull/8937","tags":["issue-tracking","patch"],"source":"VulnCheck"},{"url":"https://github.com/Skyvern-AI/skyvern/commit/31a64c1a4b5dfaf1e76a7164845e10f2d68248dc","tags":["patch"],"source":"VulnCheck"},{"url":"https://github.com/Skyvern-AI/skyvern/blob/v1.0.56/skyvern/forge/sdk/workflow/code_block_safety.py#L106-L142","tags":["technical-description"],"source":"VulnCheck"},{"url":"https://github.com/Skyvern-AI/skyvern/blob/v1.0.56/skyvern/forge/sdk/workflow/service.py#L1509-L1511","tags":["technical-description"],"source":"VulnCheck"},{"url":"https://www.vulncheck.com/advisories/skyvern-through-1.0.56-script-sandbox-bypass-via-types-codetype-bytecode","tags":["third-party-advisory"],"source":"VulnCheck"}],"weaknesses":[{"id":"CWE-184","description":"Incomplete List of Disallowed Inputs","source":"VulnCheck"}],"applicability":[],"prioritization":[{"source":"CISA-ADP","type":"SSVC","role":"CISA Coordinator","timestamp":"2026-11-06T17:27:54.295241Z","decisions":[{"name":"Exploitation","value":"none"},{"name":"Automatable","value":"no"},{"name":"Technical Impact","value":"total"}]}]},"title":"Skyvern through 1.0.56 Script Sandbox Bypass via types.CodeType Bytecode","titleSource":"VulnCheck","descriptionSource":"VulnCheck","description":"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.","score":8.8,"severity":"high","published":"2026-11-06T15:00:59.895Z","modified":"2026-11-06T17:28:18.374Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"Skyvern-AI","name":"skyvern","platforms":[],"versions":[{"version":"0","status":"affected","lessThanOrEqual":"1.0.56","versionType":"semver"}],"defaultStatus":"unaffected","packageURL":"pkg:pypi/skyvern","packageIdentity":{"ecosystem":"PyPI","name":"skyvern"},"cpes":[],"source":"VulnCheck","url":"https://www.cve.org/CVERecord?id=CVE-2026-123783"}],"remediation":[],"references":["https://github.com/Skyvern-AI/skyvern/issues/8927","https://github.com/Skyvern-AI/skyvern","https://github.com/Skyvern-AI/skyvern/pull/8937","https://github.com/Skyvern-AI/skyvern/commit/31a64c1a4b5dfaf1e76a7164845e10f2d68248dc","https://github.com/Skyvern-AI/skyvern/blob/v1.0.56/skyvern/forge/sdk/workflow/code_block_safety.py#L106-L142","https://github.com/Skyvern-AI/skyvern/blob/v1.0.56/skyvern/forge/sdk/workflow/service.py#L1509-L1511","https://www.vulncheck.com/advisories/skyvern-through-1.0.56-script-sandbox-bypass-via-types-codetype-bytecode"],"sources":[{"name":"CVE","id":"CVE-2026-123783","modified":"2026-11-06T17:28:18.374Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-123783"}],"assessments":[{"source":"VulnCheck","vector":"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","score":8.7},{"source":"VulnCheck","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":8.8}],"sourceAffected":[],"observedAt":"2026-11-06T17:36:06.451Z","kev":{"status":"not-listed","checkedAt":"2026-11-15T02:25:31.038Z"},"coverage":[{"source":"NVD","status":"available","checkedAt":"2026-11-06T17:40:32.598Z","attemptedAt":"2026-11-06T17:40:32.598Z"},{"source":"GHSA","status":"available","checkedAt":"2026-11-06T17:40:32.710Z","attemptedAt":"2026-11-06T17:40:32.710Z"},{"source":"EUVD","status":"available","checkedAt":"2026-11-06T17:40:33.129Z","attemptedAt":"2026-11-06T17:40:33.129Z"},{"source":"EPSS","status":"no-result","checkedAt":"2026-11-06T17:40:32.703Z","attemptedAt":"2026-11-06T17:40:32.703Z"}],"evidence":[{"source":"NVD","id":"CVE-2026-123783","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-123783","modified":"2026-11-06T15:17:21.250","score":8.7,"vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","checkedAt":"2026-11-06T17:40:32.598Z"},{"source":"NVD","id":"CVE-2026-123783","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-123783","modified":"2026-11-06T15:17:21.250","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","checkedAt":"2026-11-06T17:40:32.598Z"},{"source":"GitHub Advisory Database","id":"GHSA-2555-vffj-g73c","url":"https://github.com/advisories/GHSA-2555-vffj-g73c","modified":"2026-11-06T15:31:36Z","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","checkedAt":"2026-11-06T17:40:32.710Z"},{"source":"ENISA EUVD","id":"EUVD-2026-118301","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-118301","modified":"Nov 6, 2026, 3:31:28 PM","score":8.7,"vector":"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","checkedAt":"2026-11-06T17:40:33.129Z"}],"aiSummary":{"text":"Skyvern through 1.0.56 has a sandbox bypass vulnerability, allowing authenticated users to execute code by reconstructing functions from raw bytecode. Attackers can import blocked modules and run code in the server process.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-11-06T17:41:11.541Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-123783"}]}}