CVE-2026-100861: Heymrun Heym

Medium severity, CVSS 5.0. EPSS: 0.2% chance of exploitation in the next 30 days.

heym before 0.0.105 fails to apply egress guards to integration services that use credential-supplied base URLs, allowing authenticated users to bypass SSRF protections. Attackers can configure credentials pointing to loopback, private, or cloud-metadata addresses and read internal service responses returned as workflow node output.

Affected products

• Heymrun Heym: before 0.0.105 (fixed in 0.0.105)

Published 2026-09-27. Last modified 2026-09-28.