EUVD-2026-68774Severity by source
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:X/V:X/RE:X/U:X
Network-delivered CSRF with no attacker privileges; user interaction required; confidentiality and integrity high due to account takeover, availability low since victim session is disrupted but service remains up.
Primary rating from Vendor (GitHub_M).
CVSS VectorVendor: GitHub_M
Lifecycle Timeline
5DescriptionCVE.org
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.
Articles & Coverage 1
AnalysisAI
OIDC login CSRF in Wallos prior to 4.9.4 allows a remote unauthenticated attacker to log a victim into the attacker's own account by tricking them into visiting a crafted callback URL. The root cause is that checksession.php processes the OIDC authorization callback without validating the state parameter against the session-stored nonce generated in login.php, breaking the OIDC CSRF protection mechanism entirely. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that the victim's Wallos instance has OIDC login configured and enabled - this is a non-default, administrator-selected integration with an external identity provider. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector (AV:N/AC:L/AT:P/PR:N/UI:A) scores 7.5, with AT:P reflecting that the victim's Wallos instance must have OIDC configured - a non-default, operator-selected feature. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade to Wallos v4.9.5 or later; v4.9.4 introduced the OIDC state validation fix (commit 85bba48) but is marked broken due to a container startup failure - do not deploy 4.9.4. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, assess whether OIDC login is essential for your Wallos deployment; if not, disable OIDC authentication as an interim control. …
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External POC / Exploit Code
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