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Vulnerability record · CVE-2026-54599 · published 31 August 2026

CVE-2026-54599: Cross-site request forgery vulnerability

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.

7.5 CVSS 4.0 High EPSS 0.22% · top 88.4% CWE-352 · Cross-site request forgery Deferred
7.5CVSS 4.0 base score
0.22%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
8 Sep 2026Last modified by NVD

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:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://github.com/ellite/Wallos/releases/tag/v4.9.4
https://github.com/ellite/Wallos/security/advisories/GHSA-gr2w-m9v4-qm3v
https://github.com/ellite/Wallos/security/advisories/GHSA-gr2w-m9v4-qm3v

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Source: NIST National Vulnerability Database (record CVE-2026-54599), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.