Vulnerability · Published Sep 27, 2026 · Assigned by VulnCheck
CVE-2026-100862heym before 0.0.91 Multiple Secrets Plaintext Storage
Medium 4.9
In plain English
A medium-severity security flaw in heym from heymrun. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 9% of all known vulnerabilities).
Official description
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.
Affected products (as reported)
Weakness: CWE-312 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
References
- GitHub Security Advisory (GHSA-6x65-w7q7-wg93) vendor-advisory
- VulnCheck Advisory: heym before 0.0.91 Multiple Secrets Plaintext Storage third-party-advisory