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.
History

Tue, 01 Sep 2026 15:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Mon, 31 Aug 2026 21:45:00 +0000

Type Values Removed Values Added
First Time appeared Ellite
Ellite wallos
Vendors & Products Ellite
Ellite wallos

Mon, 31 Aug 2026 20:45:00 +0000

Type Values Removed Values Added
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.
Title Wallos: OIDC state parameter never validated — login CSRF / account takeover
Weaknesses CWE-352
References
Metrics cvssV4_0

{'score': 7.5, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-08-31T20:30:30.913Z

Updated: 2026-09-01T14:43:41.741Z

Reserved: 2026-06-15T19:45:23.539Z

Link: CVE-2026-54599

cve-icon Vulnrichment

Updated: 2026-09-01T14:43:34.777Z

cve-icon NVD

Status : Received

Published: 2026-08-31T21:17:10.063

Modified: 2026-09-01T15:17:20.630

Link: CVE-2026-54599

cve-icon Redhat

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