---
id: CVE-2026-54599
title: 'Wallos is an open-source, self-hostable personal subscription tracker'
summary: >-
  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…
severity: none
cwe:
  - CWE-352
published: '2026-08-31'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T21:11:31.703'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-54599'
references:
  - url: 'https://github.com/ellite/Wallos/releases/tag/v4.9.4'
    label: security-advisories@github.com
  - url: 'https://github.com/ellite/Wallos/security/advisories/GHSA-gr2w-m9v4-qm3v'
    label: security-advisories@github.com
  - url: 'https://github.com/ellite/Wallos/security/advisories/GHSA-gr2w-m9v4-qm3v'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
epss: 0.00171
epssPercentile: 0.06866
ingestedAt: '2026-09-08T22:12:30.944Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.