Medium 4.9Published Sep 27, 2026

CVE-2026-100862heym before 0.0.91 Multiple Secrets Plaintext Storage

Updated under an hour ago (2026-10-19 12:10 UTC)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for heymrun heym

Exploited in the last 30 days

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.

CVSS: 4.9 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
Weakness (CWE): CWE-312
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Deferred
Record last updated: Sep 30, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

heymrun heym heymrun:heym (from the name)	before 0.0.91; 0.0.91 not affected	CNA record

References

https://github.com/heymrun/heym/security/advisories/GHSA-6x65-w7q7-wg93vendor-advisory
https://www.vulncheck.com/advisories/heym-before-0.0.91-multiple-secrets-plaintext-storagethird-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.