Is there a public exploit for CVE-2026-123783?

No public exploit for CVE-2026-123783 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-123783?

CVE-2026-123783 scores CVSS 8.7 (v4.0), rated high.

What does CVE-2026-123783 affect?

CVE-2026-123783 affects Skyvern-AI Skyvern.

8.7 High

Skyvern through 1.0.56 contains a sandbox bypass vulnerability that allows authenticated users to execute code by reconstructing functions…

CVE-2026-123783

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 issafescriptcode AST denylist and import blocked modules such as subprocess or socket to run code in the Skyvern server process.

Assessment

CVSS: 8.7 (v4.0)
Severity: High
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 6 November 2026
Last updated: 6 November 2026
Affected: Skyvern-AI · Skyvern
Assigner: VulnCheck

CVSS vectorCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

At the source

EUVD (ENISA)

References

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