CVE-2026-100865 Heym - Multiple Vulnerabilities

Heym < 0.0.53 contains multiple vulnerabilities including arbitrary code execution via unsandboxed Python eval in workflow conditions, open webhook trigger without authentication, OAuth redirect_uri validation bypass, and plaintext storage of sensitive tokens, letting attackers execute code, trigger workflows, steal tokens, and perform unauthorized actions, exploit requires ability to edit workflows or access public webhook URLs.

CVSS base score 8.8 /10
High
CISA KEV
Not listed
Public exploit
None known
EPSS
0.32% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Multiple Vulnerabilities
Impact
Remote Code Execution, Broken Authentication, Information Disclosure, Client Script Exec
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
27 September 2026
Updated
15 October 2026
Weakness
CWE-94

Vendor fix

Update to version 0.0.53 or later

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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