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CVE-2026-123783 (GCVE-0-2026-123783)

Vulnerability from cvelistv5 – Published: 2026-11-06 15:00 – Updated: 2026-11-06 17:28

Title

Skyvern through 1.0.56 Script Sandbox Bypass via types.CodeType Bytecode

Summary

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.

Severity

8.7 (High)


                        
                          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

8.8 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-11-06 17:27 UTC

CWE

CWE-184 - Incomplete List of Disallowed Inputs

Assigner

VulnCheck CNA

References

7 references

URL	Tags
https://github.com/Skyvern-AI/skyvern/issues/8927	issue-tracking
https://github.com/Skyvern-AI/skyvern	product
https://github.com/Skyvern-AI/skyvern/pull/8937	issue-trackingpatch
https://github.com/Skyvern-AI/skyvern/commit/31a6…	patch
https://github.com/Skyvern-AI/skyvern/blob/v1.0.5…	technical-description
https://github.com/Skyvern-AI/skyvern/blob/v1.0.5…	technical-description
https://www.vulncheck.com/advisories/skyvern-thro…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
Skyvern-AI	skyvern	Affected: 0 , ≤ 1.0.56 (semver)

Date Public

2026-10-16 00:00

Credits

George Chen Aaron Perez

Show details on NVD website

JSON

To clipboard

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CVE-2026-82447 (GCVE-0-2026-82447)

Vulnerability from cvelistv5 – Published: 2026-08-29 12:05 – Updated: 2026-09-24 14:20