CVE-2026-100861 MEDIUM

CVE-2026-100861: heym before 0.0.105 SSRF via credential-controlled base URLs

Vendor Heymrun

Product heym

Weakness CWE-918 · SSRF

Published September 27, 2026

Last update September 27, 2026

View on NVD All CVEs

CVSS base score

5.3/10

Attack vector Network

Attack complexity Low

Privileges required Low

User interaction None

Confidentiality —

Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:L

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

September 27, 2026 CVE published

External resources

03References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2026-100861 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/918.html AskarLabs — CWE-918 write-up Server-Side Request Forgery

Related vulnerabilities

04Related CVE

CVE-2026-5737 Independent Analytics <= 2.14.9 - Unauthenticated Server-Side Request Forgery via Tracking Route CVE-2026-39464 WordPress Coming Soon Page, Under Construction & Maintenance Mode by SeedProd plugin <= 6.19.8 - Server Side Request Forgery (SSRF) vulnerability CVE-2026-46697 Fediverse Embeds: Unauthenticated SSRF / open proxy via REST media-proxy endpoint CVE-2026-11370 WP Meta SEO <= 4.5.18 - Authenticated (Contributor+) Server-Side Request Forgery via 'new_link' Parameter CVE-2026-6812 Ona <= 1.26 - Authenticated (Administrator+) Blind Server-Side Request Forgery via 'download_link' Parameter