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CVE-2026-63088— stoatchat < 0.14.0 SSRF via DNS-based IP Blocklist Bypass

Quick assessment

Affected
stoatchat stoatchat
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Stoat Stoat Backend是Stoat社区的一个后端服务软件。 Stoat Backend 0.14.0之前版本存在服务端请求伪造漏洞，该漏洞源于url_is_blacklisted函数中的地址验证不完整，导致未经身份验证的网络攻击者可利用服务端请求伪造漏洞绕过基于DNS的IP黑名单。

CVSS 8.6 · High EPSS 0.51% · P41

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
stoatchat stoatchat < 0.14.0 affected
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I. Basic Information for CVE-2026-63088

Vulnerability Information
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Vulnerability Title
stoatchat < 0.14.0 SSRF via DNS-based IP Blocklist Bypass
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
Stoat Backend 服务端请求伪造漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Stoat Stoat Backend是Stoat社区的一个后端服务软件。 Stoat Backend 0.14.0之前版本存在服务端请求伪造漏洞，该漏洞源于url_is_blacklisted函数中的地址验证不完整，导致未经身份验证的网络攻击者可利用服务端请求伪造漏洞绕过基于DNS的IP黑名单。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
stoatchat stoatchat 0 ~ 0.14.0 -

II. Public POCs for CVE-2026-63088

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III. Intelligence Information for CVE-2026-63088

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Vendor Advisories for CVE-2026-63088 (3)

Vendor Pages for CVE-2026-63088 (1)

Same Patch Batch · stoatchat · 2026-07-16 · 5 CVEs total

CVE-2026-63306 8.6 HIGH stoatchat before 0.13.5 Unauthenticated SSRF via proxy and embed endpoints
CVE-2024-58360 6.5 MEDIUM stoatchat before 0.7.8 Unrestricted Account Creation
CVE-2025-71377 stoatchat before 20250210-1 Unrestricted Message History Fetch
CVE-2025-71388 stoatchat 20241213-1 Webhook Token Disclosure via Read Permissions

IV. Related Vulnerabilities

Same product: stoatchat
Same vendor: stoatchat
Same weakness: CWE-918

V. Comments for CVE-2026-63088

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