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CVE-2026-50199— Wallos: Cross-user Fixer/API Layer credential consumption in exchange-rate refresh

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 是一款开源的、可自托管的个人订阅追踪工具。在 4.9.1 版本之前， 端点会全局加载第一个 Fixer/API Layer 凭证，而不是加载已认证用户的专属凭证。因此，一个没有自行配置服务商密钥的普通已认证用户，能够使用其他用户存储的服务商凭证来触发汇率刷新。该问题已在 4.9.1 版本中修复。

CVSS 4.3 · Medium EPSS 0.03% · P9

Possible ATT&CK Techniques 1 AI

T1079.004
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I. Basic Information for CVE-2026-50199

Vulnerability Information
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Vulnerability Title
Wallos: Cross-user Fixer/API Layer credential consumption in exchange-rate refresh
Source: CVE Program / CVE List V5
Vulnerability Description
Wallos is an open-source, self-hostable personal subscription tracker. Prior to version 4.9.1, endpoints/currency/update_exchange.php loads the first Fixer/API Layer credential globally instead of loading the credential for the authenticated user. As a result, a normal authenticated user without their own provider key can trigger exchange-rate refreshes using another user's stored provider credential. This issue has been patched in version 4.9.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
ellite Wallos < 4.9.1 -

II. Public POCs for CVE-2026-50199

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III. Intelligence Information for CVE-2026-50199

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Other References for CVE-2026-50199 (2)

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-2026-61641 8.1 HIGH Wallos: OIDC account takeover via email-based account linking without `email_verified` che
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-2026-50198 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-863

V. Comments for CVE-2026-50199

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