CVE-2026-105396

Medium

Description

Heym before v0.0.112 contains a token leakage vulnerability in build_public_base_url() that allows unauthenticated attackers to redirect HITL review links by spoofing Origin or X-Forwarded-Host headers. Attackers can trigger anonymous workflows with forged headers so reviewer notifications point to attacker domains, capturing capability tokens to submit decisions executed with owner credentials.

SeverityMedium

CVSS5.4

Exploit probability—

ProductHeym

PublishedOct 5, 2026

First seenOct 5, 2026

Weakness typeCWE-346CWE-346

How to fix

Update

heymrun heym0.0.112 or later

Vendor advisories

github.com/heymrun/heym/security/advisories/GHSA-6rv3-wh25-7pg5

Affected products

Product	Affected versions	Fixed in
heymrun heym	v < 0.0.112	0.0.112

Check your version

Choose the product and enter the version you run to see whether it falls in the affected range.

In the Intelligence 360 plan

Attack Surface Management

See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.