CVE-2026-108602CWE-918ssrf

CVE-2026-108602

Medium · published October 11, 2026

CVSS v3.1
4.3
EPSS
0%
Percentile
11.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
CVSS v4.0
5.3 · CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
EPSS
0.00213 · 11.0th percentile
Weakness
CWE-918 · Server-Side Request Forgery (SSRF)
Published
2026-10-11T00:16Z
References (5)
https://github.com/Helicone/helicone · [email protected]https://github.com/Helicone/helicone/blob/067d9290acb4f1fc9320e902fc67b4b399b50363/valhalla/jawn/src/controllers/public/webhookController.ts#L64-L85 · [email protected]https://github.com/Helicone/helicone/blob/067d9290acb4f1fc9320e902fc67b4b399b50363/valhalla/jawn/src/lib/clients/webhookSender.ts#L11-L76 · [email protected]https://hackmd.io/@haind/helicone-webhook-dns-ssrf · [email protected]https://www.vulncheck.com/advisories/helicone-through-2025.08.21-1-ssrf-via-jawn-webhook-sender-dns-resolution · [email protected]
EPSS history
Timeline
  • 12 OCT 03:26Z
    EPSS moved — → 0%
    epss
  • 10 OCT 19:54Z
    Helicone through v2025.08.21-1 SSRF via Jawn Webhook Sender DNS Resolution
    cvelistv5
  • 10 OCT 19:54Z
    Helicone through v2025.08.21-1 SSRF via Jawn Webhook Sender DNS Resolution
    cvelistv5