Is CVE-2026-45227 actively exploited?

No active exploitation of CVE-2026-45227 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-45227 be exploited remotely?

Yes. CVE-2026-45227 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-45227?

CVE-2026-45227 has a CVSS score of 8.8 (HIGH).

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HIGH

CVE-2026-45227

CWE-693Published: May 12, 2026· Updated: May 14, 2026

8.8

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:13.7th

Official Description

Heym before 0.0.21 contains a sandbox escape vulnerability in the custom Python tool executor that allows authenticated workflow authors to bypass sandbox restrictions by using object-graph introspection primitives. Attackers can use Python introspection techniques to recover the unrestricted __import__ function, import blocked modules such as os and subprocess, and access inherited backend environment variables containing database credentials and encryption keys to execute arbitrary host commands as the backend service user.

NVD Source

Technical Analysis

CVE-2026-45227 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.