Medium severity · published Sep 27, 2026
CVE-2026-100861
heym before 0.0.105 SSRF via credential-controlled base URLs
5.0
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 14% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HE
heym · heymrun
before 0.0.105 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-100861
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-100861
vendor-advisory
https://github.com/heymrun/heym/security/advisories/GHSA-xchj-mw74-2232
third-party-advisory
https://www.vulncheck.com/advisories/heym-before-0.0.105-ssrf-via-credential-controlled-base-urls
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