CVE-2026-63088 stoatchat < 0.14.0 SSRF via DNS-based IP Blocklist Bypass
Unauthenticated attackers can bypass IP blocklists to perform server-side request forgery, potentially accessing internal resources.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-63088?
CVE-2026-63088 is a high-severity server-side request forgery vulnerability in stoatchat, published on 16 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-918
Which versions are affected by CVE-2026-63088?
How do I fix CVE-2026-63088?
No fix has been published for CVE-2026-63088 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-2026-63088 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-63088 exists.