---
id: CVE-2026-63088
title: stoatchat < 0.14.0 SSRF via DNS-based IP Blocklist Bypass
summary: >-
  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_b…
severity: high
cvss: 8.6
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N'
cvssSource: cna
cwe:
  - CWE-918
vendor: stoatchat
product: stoatchat
affected:
  - stoatchat < 0.14.0
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-07-16T18:00:05.693791Z'
exploitAvailable: true
published: '2026-07-16'
updated: '2026-11-08'
sourceUpdated: '2026-11-08T14:07:37.575Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-63088'
references:
  - url: >-
      https://github.com/stoatchat/stoatchat/security/advisories/GHSA-4mcc-p83c-r77q
    label: GitHub Security Advisory (GHSA-4mcc-p83c-r77q)
  - url: 'https://github.com/stoatchat/stoatchat/releases/tag/v0.14.0'
    label: stoatchat 0.14.0 Release Notes
  - url: >-
      https://github.com/stoatchat/stoatchat/security/advisories/GHSA-xhww-5g9p-vvq5
    label: Incomplete Fix - GitHub Security Advisory (GHSA-xhww-5g9p-vvq5)
  - url: >-
      https://www.vulncheck.com/advisories/stoatchat-ssrf-via-dns-based-ip-blocklist-bypass
tags:
  - cve.org
  - exploit-available
epss: 0.00471
epssPercentile: 0.40966
ingestedAt: '2026-11-08T14:51:22.273Z'
---

## Overview

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

- `stoatchat < 0.14.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.