Vulnerability · Published Sep 27, 2026 · Assigned by VulnCheck
CVE-2026-100861heym before 0.0.105 SSRF via credential-controlled base URLs
Medium 5.0
In plain English
A medium-severity server-side request forgery in heym from heymrun. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 14% of all known vulnerabilities).
Severity (CVSS 3.1)5.0Medium
Exploit odds (30 days)0.2%top 86.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
heym before 0.0.105 fails to apply egress guards to integration services that use credential-supplied base URLs, allowing authenticated users to bypass SSRF protections. Attackers can configure credentials pointing to loopback, private, or cloud-metadata addresses and read internal service responses returned as workflow node output.
Affected products (as reported)
Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
References
- GitHub Security Advisory (GHSA-xchj-mw74-2232) vendor-advisory
- VulnCheck Advisory: heym before 0.0.105 SSRF via credential-controlled base URLs third-party-advisory