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CVE-2026-61641— Wallos: OIDC account takeover via email-based account linking without `email_verified` check

Quick assessment

Affected
ellite Wallos
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.

Wallos 是一款开源、可自托管的个人订阅管理工具。在 4.0.0 至 4.9.6 之前，Wallos 的 OIDC 登录功能仅通过匹配邮箱声明（email claim）将传入的 OIDC 身份关联到现有的本地账户，而未验证身份提供商（IdP）是否已核实该邮箱（email_verified）。当 Wallos 配置对接的 IdP 允许用户提交任意或未经核实的邮箱（例如多租户 IdP、支持开放自助注册的 IdP，或攻击者部分可控的 IdP）时，没有 Wallos 账户的攻击者可以使用管理员的邮箱进行身份认证，从而以

CVSS 8.1 · High

Possible ATT&CK Techniques 2 AI

T1083 · File and Directory Discovery T1079
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I. Basic Information for CVE-2026-61641

Vulnerability Information
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Vulnerability Title
Wallos: OIDC account takeover via email-based account linking without `email_verified` check
Source: CVE Program / CVE List V5
Vulnerability Description
Wallos is an open-source, self-hostable personal subscription tracker. From version 4.0.0 to before version 4.9.6, Wallos's OIDC login links an incoming OIDC identity to an existing local account by matching the email claim alone, without verifying that the IdP marked that email as verified (email_verified). When Wallos is configured against an IdP that lets a user present an arbitrary or unverified email (multi-tenant IdPs, IdPs with open self-registration, or any IdP the attacker partly controls), an attacker with no Wallos account can authenticate with the admin's email and be logged in as the admin — full account takeover, no password needed. This issue has been patched in version 4.9.6.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
ellite Wallos >= 4.0.0, < 4.9.6 -

II. Public POCs for CVE-2026-61641

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III. Intelligence Information for CVE-2026-61641

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Other References for CVE-2026-61641 (3)

Same Patch Batch · ellite · 2026-08-31 · 9 CVEs total

CVE-2026-61640 8.5 HIGH Wallos: SSRF via OIDC Token/UserInfo URL Configuration
CVE-2026-61639 8.5 HIGH Wallos: Zip Slip path traversal in database restore writes files to webroot
CVE-2026-54600 8.2 HIGH Wallos: Unauthenticated database replacement via import endpoint on fresh install
CVE-2026-61638 8.2 HIGH Wallos: SSRF via Test Email Notification - unvalidated SMTP host/port
CVE-2026-54598 7.5 HIGH Missing Authentication for Critical Function in wallos
CVE-2026-54599 7.5 HIGH Wallos: OIDC state parameter never validated — login CSRF / account takeover
CVE-2026-50199 4.3 MEDIUM Wallos: Cross-user Fixer/API Layer credential consumption in exchange-rate refresh
CVE-2026-50198 4.3 MEDIUM Wallos: Cross-user subscription cost inference via replacement_subscription_id

IV. Related Vulnerabilities

Same product: Wallos
Same vendor: ellite
Same weakness: CWE-287

V. Comments for CVE-2026-61641

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