CVE-2026-54599: CWE-352: Cross-Site Request Forgery (CSRF) in ellite Wallos
Description
Wallos is an open-source, self-hostable personal subscription tracker. Prior to version 4.9.4, login.php generates an OIDC state nonce stored in $_SESSION['oidc_state'], but checksession.php dispatches the OIDC callback without comparing the incoming state against the session value. An attacker can trick a victim into visiting a crafted URL, causing Wallos to exchange the attacker's authorization code and log the victim into the attacker's account. This issue has been patched in version 4.9.4.
CVSS v4.0
Score 7.5high
Affected software
ellite
Wallos
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Wallos versions before 4.9.4 generate an OIDC state nonce stored in the session during login, but the callback handler does not verify this state against the session value. This flaw enables an attacker to craft a URL that causes a victim to exchange the attacker's authorization code, resulting in the victim being logged into the attacker's account. This is a CSRF vulnerability categorized as CWE-352. The issue is fixed in Wallos 4.9.4.
Potential Impact
An attacker can cause a victim to unknowingly log into the attacker's account, potentially leading to unauthorized access to the victim's session context or data associated with the attacker's account. This undermines authentication integrity and user session security.
Mitigation Recommendations
Upgrade Wallos to version 4.9.4 or later, where the vulnerability has been patched by properly verifying the OIDC state nonce during the authentication callback. No other mitigation guidance is provided.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-06-15T19:45:23.539Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a95e9acacd9273b49934e69
Added to database: 08/31/2026, 20:53:00 UTC
Last enriched: 09/07/2026, 14:52:34 UTC
Last updated: 10/14/2026, 06:48:19 UTC
Views: 84
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