CVE-2026-63088 Details
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.
A server-side request forgery (SSRF) vulnerability has been identified in Stoatchat versions prior to 0.14.0. This vulnerability allows unauthenticated, network-accessible attackers to bypass the DNS-based IP blocklist. The issue arises from incomplete address validation in the 'url_is_blacklisted' function, which only inspects the first resolved address. As a result, attackers can exploit this flaw to access internal services via the '/proxy' and '/embed' endpoints, which lack authentication.
Users are advised to update Stoatchat to version 0.14.0 or later, where this vulnerability has been patched.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Jul 16, 2026CISA-ADP
Assessed Jul 16, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/stoatchat/stoatchat/security/advisories/GHSA-4mcc-p83c-r77q | CISA-ADP | AdvisoryExploitRemedyVendor |
| https://github.com/stoatchat/stoatchat/releases/tag/v0.14.0 | [email protected] | Release NotesVendor |
| https://github.com/stoatchat/stoatchat/security/advisories/GHSA-4mcc-p83c-r77q | [email protected] | AdvisoryExploitRemedyVendor |
| https://github.com/stoatchat/stoatchat/security/advisories/GHSA-xhww-5g9p-vvq5 | [email protected] | AdvisoryExploitTechnical AnalysisVendor |
| https://www.vulncheck.com/advisories/stoatchat-ssrf-via-dns-based-ip-blocklist-bypass | [email protected] | AdvisoryBundleRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-918 | Server-Side Request Forgery (SSRF) | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| stoatchat | < 0.14.0 (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 16, 2026 | CVE Modified | CISA-ADP |
| Jul 16, 2026 | New CVE Received | [email protected] |