CVE-2026-63088
stoatchat < 0.14.0 SSRF via DNS-based IP Blocklist Bypass
- State
- Published
- Severity
- 7.7 High
- Published
- Jul 16, 2026
- Updated
- Jul 16, 2026
- Reserved
- Jul 15, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 7.7 High | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N | VulnCheck |
| 3.1 | 8.6 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N | VulnCheck |
Weaknesses
- CWE-918 Server-Side Request Forgery (SSRF)
Affected Products
| Product | Versions |
|---|---|
stoatchatstoatchat |
|
References
- GitHub Security Advisory (GHSA-4mcc-p83c-r77q)vendor-advisory
- Release Notesrelease-notespatch
- Incomplete Fix - GitHub Security Advisory (GHSA-xhww-5g9p-vvq5)
- https://www.vulncheck.com/advisories/stoatchat-ssrf-via-dns-based-ip-blocklist-bypassthird-party-advisory
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