CVE-2026-121802 (GCVE-0-2026-121802)
Vulnerability from cvelistv5
Published
2026-11-04 02:36
Modified
2026-11-04 02:44
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-346 - Origin Validation Error
Summary
@better-auth/expo before 1.7.16 allows certain account-takeover outcomes (e.g., unauthenticated changes of any account's email address), because it signs a caller-supplied state value without checking whether that value had been issued by the server. NOTE: the application secret must be rotated after updating to a fixed version.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| better-auth | Better Auth |
Version: 0 ≤ |
{
"containers": {
"cna": {
"affected": [
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"packageURL": "pkg:npm/%40better-auth/expo",
"product": "Better Auth",
"vendor": "better-auth",
"versions": [
{
"lessThan": "1.7.16",
"status": "affected",
"version": "0",
"versionType": "semver"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
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"versionEndExcluding": "1.7.16",
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}
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}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 9.1,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
"version": "3.1"
},
"format": "CVSS",
"scenarios": [
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"value": "GENERAL"
}
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}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-346",
"description": "CWE-346 Origin Validation Error",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-11-04T02:44:07.935Z",
"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
"shortName": "mitre"
},
"references": [
{
"url": "https://github.com/better-auth/better-auth/security/advisories/GHSA-4wq4-2ppv-q3hg"
},
{
"url": "https://github.com/better-auth/better-auth/blob/main/packages/expo/CHANGELOG.md"
},
{
"url": "https://github.com/better-auth/better-auth/releases/tag/v1.7.16"
}
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"cveMetadata": {
"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
"assignerShortName": "mitre",
"cveId": "CVE-2026-121802",
"datePublished": "2026-11-04T02:36:13.640Z",
"dateReserved": "2026-11-04T02:36:12.694Z",
"dateUpdated": "2026-11-04T02:44:07.935Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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