---
id: CVE-2026-100862
title: >-
  heym, a workflow automation platform, stores and returns multiple capability
  secrets in plaintext in versions prior to 0.0.91
summary: >-
  heym, a workflow automation platform, stores and returns multiple capability
  secrets in plaintext in versions prior to 0.0.91. Affected secrets include
  webhook header-auth values (returned in cleartext by GET /api/workflows/{id}
  and pers…
severity: medium
cvss: 4.9
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-312
vendor: heymrun
product: heym
affected:
  - heym < 0.0.91
published: '2026-09-27'
updated: '2026-09-27'
sourceUpdated: '2026-09-27T02:17:25.963'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-100862'
references:
  - url: 'https://github.com/heymrun/heym/security/advisories/GHSA-6x65-w7q7-wg93'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/heym-before-0.0.91-multiple-secrets-plaintext-storage
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-27T02:41:45.582Z'
---

## Overview

heym, a workflow automation platform, stores and returns multiple capability secrets in plaintext in versions prior to 0.0.91. Affected secrets include webhook header-auth values (returned in cleartext by GET /api/workflows/{id} and persisted unsanitized into execution history), MCP API keys (stored as a plaintext column, returned in config/list responses, and accepted via the ?key= query string so they leak into logs, proxies and Referer headers), portal session tokens (stored and validated by plaintext equality with a 168-hour TTL), workflow execution JWTs (stored in full and re-listed by GET .../execution-tokens), Discord interaction tokens (the full interaction body is stored in execution history), and global variables. A user with read access to a workflow, share/team membership, or anyone able to read the database, a backup, or logs can recover these secrets and replay them to execute workflows or act as the secret owner.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.