CVE-2026-101049
Heym before 0.0.53 Slack Webhook Signature Verification Bypass
- State
- Published
- Severity
- 8.3 High
- Published
- Sep 27, 2026
- Updated
- Sep 28, 2026
- Reserved
- Sep 27, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.3 High | CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 6.5 Medium | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N | VulnCheck |
Weaknesses
- CWE-287 Improper Authentication
Affected Products
| Product | Versions |
|---|---|
heymheymrun |
|
References
- GitHub Security Advisory (GHSA-pm6h-x3h5-j38h)vendor-advisory
- Patch Commitpatch
- VulnCheck Advisory: Heym before 0.0.53 Slack Webhook Signature Verification Bypassthird-party-advisory
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