# CVE-2026-100860: heym Redis node credential authorization bypass

Source: https://junglewise.ai/threats/cve-2026-100860-heym-before-0-0-105-does-not-act-on-the-result-of-the-credential  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-27. Updated: 2026-09-27  
License: CC BY 4.0 with a link back

CVE-2026-100860 · Severity: medium · CVSS 5.5 · Published 2026-09-27

heym is a workflow automation platform that lets users build and execute workflows with various integrations. When an authenticated workflow author references a Redis credential they don't own or that has been deleted, the system falls back to connecting to the local Redis instance on localhost:6379 with no password, bypassing authorization checks. On deployments with an accessible local Redis, this allows unauthorized read/write access to that Redis instance.

Technologies: [Heym](https://junglewise.ai/threats/technologies/heym-heym). Vendors: [Heym](https://junglewise.ai/threats/vendors/heym).

## Quick answers

**Is CVE-2026-100860 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-100860 being exploited in the wild.

**How severe is CVE-2026-100860?** Medium severity, with a CVSS score of 5.5, published 27 September 2026.

**Which products and versions are affected?** Heym before 0.0.105.

**Is there a fix for CVE-2026-100860?** A patch was published on 2026-09-03: v0.0.105 released with fix Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-100860 attacked?** It is attacked with local access, in a hosted service.

**Am I affected by CVE-2026-100860?** Check whether you run Heym at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The Redis workflow node fails to check the result of _get_accessible_credential(), which returns None on authorization failure or missing credentials. This None is treated as an empty configuration, causing all connection parameters to default to localhost:6379 with no password. An authenticated attacker supplies a credential ID they don't own to trigger this fallback, gaining unauthorized access to any Redis service listening on the backend's loopback interface.

## Affected products

- heym heym before 0.0.105

## Timeline

- 2026-09-27: disclosed: CVE-2026-100860 published
- 2026-09-03: patched: v0.0.105 released with fix
- 2026-09-03: advisory: GHSA-fmpw-hj3m-xvj6 published

## References

- [https://github.com/heymrun/heym/security/advisories/GHSA-fmpw-hj3m-xvj6](https://github.com/heymrun/heym/security/advisories/GHSA-fmpw-hj3m-xvj6)
- [https://www.vulncheck.com/advisories/heym-before-0.0.105-authentication-bypass-via-redis-node](https://www.vulncheck.com/advisories/heym-before-0.0.105-authentication-bypass-via-redis-node)

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