CVE-2026-101049: Heymrun Heym

Medium severity, CVSS 6.5. EPSS: 0.3% chance of exploitation in the next 30 days.

Heym before 0.0.53 fails to verify Slack request signatures when trigger nodes lack credential IDs or have empty signing secrets. Remote unauthenticated attackers can send forged Slack events to known webhook URLs to trigger workflows with the owner's credentials.

Affected products

• Heymrun Heym: before 0.0.53 (fixed in 0.0.53)

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