CVE-2026-63088

High

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.

SeverityHigh

CVSS8.6

Exploit probability—

ProductStoatchat

PublishedJul 16, 2026

First seenJul 16, 2026

Weakness typeCWE-918Server-side request forgery (SSRF)

How to fix

Update

stoatchat stoatchat0.14.0 or later

Patches

github.com/stoatchat/stoatchat/releases/tag/v0.14.0

Vendor advisories

github.com/stoatchat/stoatchat/security/advisories/GHSA-4mcc-p83c-r77q

Affected products

Product	Affected versions	Fixed in
stoatchat stoatchat	v < 0.14.0	0.14.0

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