High
Wallos: OIDC state parameter never validated — login CSRF / account takeover
Type: advisorySources: OSV
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.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-54599
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 20:27 UTC · Revision 1
Source evidence
Wallos: OIDC state parameter never validated — login CSRF / account takeover
core-osv · Original sourcePublished 31 Aug 2026, 20:30 UTC
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.
osv:CVE-2026-54599
Complete source record
{
"id": "f588eb4403af29e054474f6a0b06165da72205b813729a38bebcaf3cc30eb9ab",
"url": "https://osv.dev/vulnerability/CVE-2026-54599",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Wallos: OIDC state parameter never validated — login CSRF / account takeover",
"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 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.",
"evidence": "osv:CVE-2026-54599",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2026-54599",
"aliases": [
"CVE-2026-54599",
"GHSA-gr2w-m9v4-qm3v"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "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"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/ellite/wallos",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "ce789255b1f42edfc9f286690d223352263468b3"
}
],
"database_specific": {
"extracted_events": [
{
"range": [
{
"introduced": "0"
},
{
"fixed": "4.9.4"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
"fixed": "ce789255b1f42edfc9f286690d223352263468b3"
}
],
"source": "REFERENCES_TAG",
"original_tag": "v4.9.4"
},
{
"range": [
{
"introduced": "0"
},
{
"fixed": "4.9.4"
}
],
"source": "DESCRIPTION"
}
]
}
}
],
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],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54599.json"
}
}
],
"modified": "2026-10-28T02:30:39.171199247Z",
"provider": "osv",
"references": [
"https://github.com/ellite/Wallos/releases/tag/v4.9.4",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54599.json",
"https://github.com/ellite/Wallos/security/advisories/GHSA-gr2w-m9v4-qm3v",
"https://nvd.nist.gov/vuln/detail/CVE-2026-54599"
],
"provider_metadata": {
"cwe_ids": [
"CWE-352"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54599.json"
}
},
"related_cves": [
{
"value": "CVE-2026-54599",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 506673,
"published_at": "2026-08-31T20:30:30.913+00:00"
}