CVE-2026-101049: Improper Authentication in heymrun heym
Heym versions before 0.0.53 do not properly verify Slack request signatures when trigger nodes lack credential IDs or have empty signing secrets. This flaw allows remote unauthenticated attackers to send forged Slack events to known webhook URLs, potentially triggering workflows with the owner's credentials.
AI Analysis
Technical Summary
CVE-2026-101049 describes an improper authentication vulnerability in heymrun's heym product prior to version 0.0.53. The software fails to verify Slack request signatures correctly if trigger nodes are missing credential IDs or have empty signing secrets. This weakness enables remote attackers without authentication to forge Slack events and send them to webhook URLs, causing workflows to execute under the owner's credentials.
Potential Impact
An attacker can remotely send forged Slack events to webhook URLs associated with vulnerable heym instances, triggering workflows with the privileges of the workflow owner. This could lead to unauthorized workflow execution and potential misuse of the owner's credentials. The vulnerability requires high attack complexity and partial user interaction is not applicable, but no privileges are required to exploit it.
Mitigation Recommendations
A fix is available in heym version 0.0.53 and later. Users should upgrade to version 0.0.53 or newer to remediate this vulnerability. No additional mitigation steps are indicated.
CVE-2026-101049: Improper Authentication in heymrun heym
Description
Heym versions before 0.0.53 do not properly verify Slack request signatures when trigger nodes lack credential IDs or have empty signing secrets. This flaw allows remote unauthenticated attackers to send forged Slack events to known webhook URLs, potentially triggering workflows with the owner's credentials.
CVSS v4.0
Score 8.3high
Affected software
heymrun
heym
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-101049 describes an improper authentication vulnerability in heymrun's heym product prior to version 0.0.53. The software fails to verify Slack request signatures correctly if trigger nodes are missing credential IDs or have empty signing secrets. This weakness enables remote attackers without authentication to forge Slack events and send them to webhook URLs, causing workflows to execute under the owner's credentials.
Potential Impact
An attacker can remotely send forged Slack events to webhook URLs associated with vulnerable heym instances, triggering workflows with the privileges of the workflow owner. This could lead to unauthorized workflow execution and potential misuse of the owner's credentials. The vulnerability requires high attack complexity and partial user interaction is not applicable, but no privileges are required to exploit it.
Mitigation Recommendations
A fix is available in heym version 0.0.53 and later. Users should upgrade to version 0.0.53 or newer to remediate this vulnerability. No additional mitigation steps are indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-09-27T15:48:49.472Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6ab948d1f7a7c541063df7c0
Added to database: 09/27/2026, 16:48:17 UTC
Last enriched: 09/27/2026, 17:02:45 UTC
Last updated: 09/27/2026, 17:57:15 UTC
Views: 7
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