CVE-2026-63088: Stoatchat

High severity, CVSS 8.6. EPSS: 0.5% chance of exploitation in the next 30 days.

stoatchat before 0.14.0 contains a server-side request forgery (SSRF) vulnerability that allows unauthenticated network-accessible attackers to bypass the DNS-based IP blocklist by exploiting incomplete address validation in the url_is_blacklisted function, which inspects only the first resolved address while the underlying HTTP client iterates all cached addresses.

Affected products

• Stoatchat Stoatchat: before 0.14.0 (fixed in 0.14.0)

Published 2026-07-16. Last modified 2026-07-16.