CVE-2026-63306 stoatchat before 0.13.5 Unauthenticated SSRF via proxy and embed endpoints
Unauthenticated attackers can exploit SSRF in stoatchat to access internal services and metadata via proxy and embed endpoints.
- 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-2026-63306?
CVE-2026-63306 is a critical 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 0.13.5 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: CWE-918
Which versions are affected by CVE-2026-63306?
How do I fix CVE-2026-63306?
No fix has been published for CVE-2026-63306 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-2026-63306 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-63306 exists.
Sources
Also known as GHSA-j5jq-jcvc-gxxc, GHSA-xhww-5g9p-vvq5.