CVE-2026-105396

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.

CVSS v3 5.4 MEDIUM

5.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/heymrun/heym/security/advisories/GHSA-6rv3-wh25-7pg5
https://www.vulncheck.com/advisories/heym-before-0.0.112-hitl-review-token-leak-via-spoofable-origin-header

Configurations

No configuration.

History

05 Oct 2026, 12:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-05 12:17

Updated : 2026-10-05 16:00

NVD link : CVE-2026-105396

Mitre link : CVE-2026-105396

CVE.ORG link : CVE-2026-105396

JSON object : View

Products Affected

No product.

CWE

CWE-346

Origin Validation Error

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