CVE-2026-100862 heym before 0.0.91 Multiple Secrets Plaintext Storage
heym stores multiple secrets in plaintext, allowing attackers with read access to recover credentials and execute workflows or impersonate users.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-100862?
CVE-2026-100862 is a medium-severity vulnerability in heymrun heym, published on 27 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.
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.
Weakness: CWE-312
Which versions are affected by CVE-2026-100862?
How do I fix CVE-2026-100862?
No fix has been published for CVE-2026-100862 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-100862 being exploited?
There is no known exploitation of CVE-2026-100862 in the wild and no public exploit code.
Sources
Also known as GHSA-6x65-w7q7-wg93, GHSA-v692-j72v-6h8x.