CVE-2026-108602 Helicone through v2025.08.21-1 SSRF via Jawn Webhook Sender DNS Resolution
Authenticated users can exploit DNS rebinding in Helicone's webhook sender to access internal services via SSRF.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-108602?
CVE-2026-108602 is a medium-severity server-side request forgery vulnerability in helicone, published on 10 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-918
Which versions are affected by CVE-2026-108602?
How do I fix CVE-2026-108602?
No fix has been published for CVE-2026-108602 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-108602 being exploited?
There is no known exploitation of CVE-2026-108602 in the wild and no public exploit code.
Sources
Also known as GHSA-ch5j-5g34-4wwh.