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CVE-2026-41688— Incomplete fix for CVE-2026-33399: SSRF in Wallos

Quick assessment

Affected
ellite Wallos
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.

Wallos是Miguel Ribeiro个人开发者的一个开源个人订阅跟踪器。 Wallos 4.8.4及之前版本存在代码问题漏洞，该漏洞源于SSRF修复不完整，通过gethostbyname验证Webhook URL但未使用CURLOPT_RESOLVE固定，存在DNS重绑定TOCTOU窗口。

CVSS 7.7 · High EPSS 0.39% · P30

Possible ATT&CK Techniques 1 AI

T1557 · Adversary-in-the-Middle

Affected Version Matrix 1

VendorProduct Version RangeStatus
ellite Wallos <= 4.8.4 affected
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I. Basic Information for CVE-2026-41688

Vulnerability Information
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Vulnerability Title
Incomplete fix for CVE-2026-33399: SSRF in Wallos
Source: CVE Program / CVE List V5
Vulnerability Description
Wallos is an open-source, self-hostable personal subscription tracker. In versions 4.8.4 and prior, the incomplete SSRF fix in Wallos validates webhook URLs via gethostbyname() but passes the original hostname to cURL without CURLOPT_RESOLVE pinning on 10 of 11 outbound HTTP endpoints, leaving a DNS rebinding TOCTOU window. At time of publication, there are no publicly available patches.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/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
Wallos 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Wallos是Miguel Ribeiro个人开发者的一个开源个人订阅跟踪器。 Wallos 4.8.4及之前版本存在代码问题漏洞，该漏洞源于SSRF修复不完整，通过gethostbyname验证Webhook URL但未使用CURLOPT_RESOLVE固定，存在DNS重绑定TOCTOU窗口。
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
ellite Wallos <= 4.8.4 -

II. Public POCs for CVE-2026-41688

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 8320 chars
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III. Intelligence Information for CVE-2026-41688

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Patches & Fixes for CVE-2026-41688 (1)

Vendor Advisories for CVE-2026-41688 (1)

Same Patch Batch · ellite · 2026-05-07 · 3 CVEs total

CVE-2026-41689 6.0 MEDIUM Wallos: Shared local webhook allowlist lets low-privilege users send arbitrary requests to
CVE-2026-41687 4.3 MEDIUM Wallos: SSRF CGNAT Bypass in subscription/payments Logo URL — is_cgnat_ip() Not Used in In

IV. Related Vulnerabilities

Same product: Wallos
Same vendor: ellite
Same weakness: CWE-918

V. Comments for CVE-2026-41688

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