VULNERABILITY INTELLIGENCE
CVE-2026-63306
CVSS score8.6 HIGH
EPSS probability0.30%
CISA KEVNot currently listed
Published2026-07-16
Last modified2026-10-08
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Description
stoatchat before 0.13.5 contains an unauthenticated server-side request forgery vulnerability in the /proxy and /embed endpoints that accept arbitrary URLs without DNS resolution filtering or private IP range validation. Attackers can enumerate internal services, fingerprint applications, and reach instance metadata endpoints by supplying malicious URLs or leveraging redirect chains to access internal infrastructure.
Weakness classification
- disclosure@vulncheck.com: CWE-918