CVE-2026-101049

Medium

Description

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.

SeverityMedium

CVSS6.5

Exploit probability—

ProductHeym

PublishedSep 27, 2026

First seenSep 27, 2026

Weakness typeCWE-287Improper authentication

How to fix

Update

heymrun heym0.0.53 or later

Patches

github.com/heymrun/heym/commit/341d1012367cd74f85c617e1c98dd49e3fcb5e83

Vendor advisories

github.com/heymrun/heym/security/advisories/GHSA-pm6h-x3h5-j38h

Affected products

Product	Affected versions	Fixed in
heymrun heym	v < 0.0.53	0.0.53

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