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CVE-2026-63306— stoatchat before 0.13.5 Unauthenticated SSRF via proxy and embed endpoints

Quick assessment

Affected
stoatchat stoatchat
Exploitation
Public or AI PoC available; prioritize validation
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 0.13.5之前版本存在服务端请求伪造漏洞，该漏洞源于/proxy和/embed端点接受任意URL，且未进行DNS解析过滤或私有IP范围验证，可能导致未经身份验证的攻击者利用恶意URL或重定向链枚举内部服务、指纹识别应用并访问实例元数据端点。

CVSS 8.6 · High EPSS 0.41% · P33

Affected Version Matrix 2

VendorProduct Version RangeStatus
stoatchat stoatchat < 0.13.5 affected
0.13.5 unaffected
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I. Basic Information for CVE-2026-63306

Vulnerability Information
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Vulnerability Title
stoatchat before 0.13.5 Unauthenticated SSRF via proxy and embed endpoints
Source: CVE Program / CVE List V5
Vulnerability Description
stoatchat before 0.13.5 contains an unauthenticated server-side request forgery vulnerability in the /proxy and /embed endpoints that accept arbitrary URLs without DNS resolution filtering or private IP range validation. Attackers can enumerate internal services, fingerprint applications, and reach instance metadata endpoints by supplying malicious URLs or leveraging redirect chains to access internal infrastructure.
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 0.13.5之前版本存在服务端请求伪造漏洞，该漏洞源于/proxy和/embed端点接受任意URL，且未进行DNS解析过滤或私有IP范围验证，可能导致未经身份验证的攻击者利用恶意URL或重定向链枚举内部服务、指纹识别应用并访问实例元数据端点。
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 ~ 0.13.5 -

II. Public POCs for CVE-2026-63306

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 7923 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-63306

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Vendor Advisories for CVE-2026-63306 (2)

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

CVE-2026-63088 8.6 HIGH stoatchat < 0.14.0 SSRF via DNS-based IP Blocklist Bypass
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-2026-63306

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