Vulnerability DatabaseCVE-2026-108602
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CVE-2026-108602
Published:October 10, 2026
Updated:October 13, 2026
Helicone through v2025.08.21-1 contains a server-side request forgery vulnerability in the Jawn webhook sender that allows authenticated organization users to reach internal services by using hostnames resolving to private addresses. Attackers can create webhooks with public hostnames that resolve or DNS-rebind to loopback or internal addresses, causing blind POST requests to internal HTTPS services.
Related Resources (7)
https://github.com/Helicone/helicone/blob/067d9290acb4f1fc9320e902fc67b4b399b50363/valhalla/jawn/src/lib/clients/webhookSender.ts#L11-L76
https://www.vulncheck.com/advisories/helicone-through-2025.08.21-1-ssrf-via-jawn-webhook-sender-dns-resolution
https://github.com/Helicone/helicone
https://hackmd.io/@haind/helicone-webhook-dns-ssrf
https://github.com/Helicone/helicone/blob/067d9290acb4f1fc9320e902fc67b4b399b50363/valhalla/jawn/src/controllers/public/webhookController.ts#L64-L85
https://nvd.nist.gov/vuln/detail/CVE-2026-108602
https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/108xxx/CVE-2026-108602.json
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CVSS v4
Base Score:
5.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
4.3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Server-Side Request Forgery (SSRF)
CWE-918
EPSS
Base Score:
0.21