CVE-2026-101049
Heym before 0.0.53 Slack Webhook Signature Verification Bypass
MEDIUM
6.5
CVSS Score
Published: September 27, 2026 at 04:28 PM UTC
Updated: September 28, 2026 at 09:02 PM UTC
1 product affected across 1 vendorHeym
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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.4%
SSVC
PoC
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.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
References (3)
Vendor Advisory
Source: cverecord
https://github.com/heymrun/heym/security/advisories/GHSA-pm6h-x3h5-j38hPatch
Source: cverecord
https://github.com/heymrun/heym/commit/341d1012367cd74f85c617e1c98dd49e3fcb5e83Third Party Advisory
Source: cverecord
https://www.vulncheck.com/advisories/heym-before-0.0.53-slack-webhook-signature-verification-bypassSSVC — Action Prioritization
SSVCPoCNot automatablePartial impact
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
6.5MEDIUMVulnCheck
- Attack Vector
- NETWORK
- Complexity
- HIGH
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- LOW
- Integrity
- HIGH
- Availability
- NONE
Vector?
Quick Info
StatusDEFERRED
CWE
CWE-287
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