Vulnerability · Published Jul 16, 2026 · Assigned by VulnCheck
CVE-2026-63088stoatchat < 0.14.0 SSRF via DNS-based IP Blocklist Bypass
High 8.6
In plain English
A high-severity server-side request forgery in stoatchat from stoatchat. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 41% of all known vulnerabilities).
Severity (CVSS 3.1)8.6High
Exploit odds (30 days)0.5%top 59.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
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.
Affected products (as reported)
Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
References
- GitHub Security Advisory (GHSA-4mcc-p83c-r77q) vendor-advisory
- Release Notes release-notes, patch
- Incomplete Fix - GitHub Security Advisory (GHSA-xhww-5g9p-vvq5)
- https://www.vulncheck.com/advisories/stoatchat-ssrf-via-dns-based-ip-blocklist-bypass third-party-advisory