Critical
Better Auth 1.4.0-beta.18 before 1.7.7 Authentication Bypass via Magic Link
Type: advisorySources: OSV
Better Auth from 1.4.0-beta.18 before 1.7.7 contains an authentication bypass vulnerability that allows unauthenticated attackers to sign in as other users by reusing OAuth state values as Magic Link tokens. Attackers can start an OAuth sign-in with a victim's email and submit the returned state to Magic Link verification, gaining sessions or creating falsely email-verified accounts.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-110862, CVE-2026-114607
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 22:12 UTC · Revision 1
Source evidence
Better Auth 1.4.0-beta.18 before 1.7.7 Authentication Bypass via Magic Link
core-osv · Original sourcePublished 14 Oct 2026, 22:52 UTC
Better Auth from 1.4.0-beta.18 before 1.7.7 contains an authentication bypass vulnerability that allows unauthenticated attackers to sign in as other users by reusing OAuth state values as Magic Link tokens. Attackers can start an OAuth sign-in with a victim's email and submit the returned state to Magic Link verification, gaining sessions or creating falsely email-verified accounts.
osv:CVE-2026-110862
Complete source record
{
"id": "2145d15e1844b18bacfa88fba48094b1996bb354b5d8059a41b60f5f2f51d486",
"url": "https://osv.dev/vulnerability/CVE-2026-110862",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Better Auth 1.4.0-beta.18 before 1.7.7 Authentication Bypass via Magic Link",
"summary": "Better Auth from 1.4.0-beta.18 before 1.7.7 contains an authentication bypass vulnerability that allows unauthenticated attackers to sign in as other users by reusing OAuth state values as Magic Link tokens. Attackers can start an OAuth sign-in with a victim's email and submit the returned state to Magic Link verification, gaining sessions or creating falsely email-verified accounts.",
"evidence": "osv:CVE-2026-110862",
"products": [],
"severity": "critical",
"structured": {
"id": "CVE-2026-110862",
"aliases": [
"CVE-2026-110862",
"CVE-2026-114607",
"GHSA-965c-763c-88jm"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/better-auth/better-auth",
"type": "GIT",
"events": [
{
"introduced": "04c0c10472ae2f287da0c352e719fa22ca49e674"
},
{
"fixed": "db02f233918ad1233bf0753e437e1c0da353273d"
}
],
"database_specific": {
"extracted_events": [
{
"range": [
{
"introduced": "1.4.0-beta.18"
},
{
"fixed": "1.7.7"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
},
{
"range": [
{
"introduced": "1.4.0-beta.18"
},
{
"fixed": "1.7.7"
}
],
"source": "DESCRIPTION"
}
]
}
}
],
"versions": [
"v1.7.6",
"v1.7.5",
"v1.7.4",
"v1.7.3",
"v1.7.2",
"v1.6.30",
"v1.7.1",
"v1.7.0",
"v1.6.29",
"v1.6.28",
"v1.6.27",
"v1.6.26",
"v1.6.25",
"v1.6.24",
"v1.6.23",
"v1.6.22",
"v1.6.21",
"v1.6.20",
"v1.6.19",
"v1.6.18",
"v1.6.17",
"v1.6.16",
"better-auth@1.6.16",
"auth@1.6.16",
"@better-auth/test-utils@1.6.16",
"@better-auth/telemetry@1.6.16",
"@better-auth/stripe@1.6.16",
"@better-auth/sso@1.6.16",
"@better-auth/scim@1.6.16",
"@better-auth/redis-storage@1.6.16",
"@better-auth/prisma-adapter@1.6.16",
"@better-auth/passkey@1.6.16",
"@better-auth/oauth-provider@1.6.16",
"@better-auth/mongo-adapter@1.6.16",
"@better-auth/memory-adapter@1.6.16",
"@better-auth/kysely-adapter@1.6.16",
"@better-auth/i18n@1.6.16",
"@better-auth/expo@1.6.16",
"@better-auth/electron@1.6.16",
"@better-auth/drizzle-adapter@1.6.16",
"@better-auth/core@1.6.16",
"@better-auth/api-key@1.6.16",
"v1.6.15",
"better-auth@1.6.15",
"auth@1.6.15",
"@better-auth/test-utils@1.6.15",
"@better-auth/telemetry@1.6.15",
"@better-auth/stripe@1.6.15",
"@better-auth/sso@1.6.15",
"@better-auth/scim@1.6.15",
"@better-auth/redis-storage@1.6.15",
"@better-auth/prisma-adapter@1.6.15",
"@better-auth/passkey@1.6.15",
"@better-auth/oauth-provider@1.6.15",
"@better-auth/mongo-adapter@1.6.15",
"@better-auth/memory-adapter@1.6.15",
"@better-auth/kysely-adapter@1.6.15",
"@better-auth/i18n@1.6.15",
"@better-auth/expo@1.6.15",
"@better-auth/electron@1.6.15",
"@better-auth/drizzle-adapter@1.6.15",
"@better-auth/core@1.6.15",
"@better-auth/api-key@1.6.15",
"v1.6.14",
"better-auth@1.6.14",
"auth@1.6.14",
"@better-auth/test-utils@1.6.14",
"@better-auth/telemetry@1.6.14",
"@better-auth/stripe@1.6.14",
"@better-auth/sso@1.6.14",
"@better-auth/scim@1.6.14",
"@better-auth/redis-storage@1.6.14",
"@better-auth/prisma-adapter@1.6.14",
"@better-auth/passkey@1.6.14",
"@better-auth/oauth-provider@1.6.14",
"@better-auth/mongo-adapter@1.6.14",
"@better-auth/memory-adapter@1.6.14",
"@better-auth/kysely-adapter@1.6.14",
"@better-auth/i18n@1.6.14",
"@better-auth/expo@1.6.14",
"@better-auth/electron@1.6.14",
"@better-auth/drizzle-adapter@1.6.14",
"@better-auth/core@1.6.14",
"@better-auth/api-key@1.6.14",
"v1.6.13",
"better-auth@1.6.13",
"auth@1.6.13",
"@better-auth/test-utils@1.6.13",
"@better-auth/telemetry@1.6.13",
"@better-auth/stripe@1.6.13",
"@better-auth/sso@1.6.13",
"@better-auth/scim@1.6.13",
"@better-auth/redis-storage@1.6.13",
"@better-auth/prisma-adapter@1.6.13",
"@better-auth/passkey@1.6.13",
"@better-auth/oauth-provider@1.6.13",
"@better-auth/mongo-adapter@1.6.13",
"@better-auth/memory-adapter@1.6.13",
"@better-auth/kysely-adapter@1.6.13",
"@better-auth/i18n@1.6.13",
"@better-auth/expo@1.6.13",
"@better-auth/electron@1.6.13",
"@better-auth/drizzle-adapter@1.6.13",
"@better-auth/core@1.6.13",
"@better-auth/api-key@1.6.13",
"v1.6.12",
"better-auth@1.6.12",
"auth@1.6.12",
"@better-auth/test-utils@1.6.12",
"@better-auth/telemetry@1.6.12",
"@better-auth/stripe@1.6.12",
"@better-auth/sso@1.6.12",
"@better-auth/scim@1.6.12",
"@better-auth/redis-storage@1.6.12",
"@better-auth/prisma-adapter@1.6.12",
"@better-auth/passkey@1.6.12",
"@better-auth/oauth-provider@1.6.12",
"@better-auth/mongo-adapter@1.6.12",
"@better-auth/memory-adapter@1.6.12",
"@better-auth/kysely-adapter@1.6.12",
"@better-auth/i18n@1.6.12",
"@better-auth/expo@1.6.12",
"@better-auth/electron@1.6.12",
"@better-auth/drizzle-adapter@1.6.12",
"@better-auth/core@1.6.12",
"@better-auth/api-key@1.6.12",
"v1.6.11",
"better-auth@1.6.11",
"auth@1.6.11",
"@better-auth/test-utils@1.6.11",
"@better-auth/telemetry@1.6.11",
"@better-auth/stripe@1.6.11",
"@better-auth/sso@1.6.11",
"@better-auth/scim@1.6.11",
"@better-auth/redis-storage@1.6.11",
"@better-auth/prisma-adapter@1.6.11",
"@better-auth/passkey@1.6.11",
"@better-auth/oauth-provider@1.6.11",
"@better-auth/mongo-adapter@1.6.11",
"@better-auth/memory-adapter@1.6.11",
"@better-auth/kysely-adapter@1.6.11",
"@better-auth/i18n@1.6.11",
"@better-auth/expo@1.6.11",
"@better-auth/electron@1.6.11",
"@better-auth/drizzle-adapter@1.6.11",
"@better-auth/core@1.6.11",
"@better-auth/api-key@1.6.11",
"v1.6.10",
"better-auth@1.6.10",
"auth@1.6.10",
"@better-auth/test-utils@1.6.10",
"@better-auth/telemetry@1.6.10",
"@better-auth/stripe@1.6.10",
"@better-auth/sso@1.6.10",
"@better-auth/scim@1.6.10",
"@better-auth/redis-storage@1.6.10",
"@better-auth/prisma-adapter@1.6.10",
"@better-auth/passkey@1.6.10",
"@better-auth/oauth-provider@1.6.10",
"@better-auth/mongo-adapter@1.6.10",
"@better-auth/memory-adapter@1.6.10",
"@better-auth/kysely-adapter@1.6.10",
"@better-auth/i18n@1.6.10",
"@better-auth/expo@1.6.10",
"@better-auth/electron@1.6.10",
"@better-auth/drizzle-adapter@1.6.10",
"@better-auth/core@1.6.10",
"@better-auth/api-key@1.6.10",
"v1.6.9",
"better-auth@1.6.9",
"auth@1.6.9",
"@better-auth/test-utils@1.6.9",
"@better-auth/telemetry@1.6.9",
"@better-auth/stripe@1.6.9",
"@better-auth/sso@1.6.9",
"@better-auth/scim@1.6.9",
"@better-auth/redis-storage@1.6.9",
"@better-auth/prisma-adapter@1.6.9",
"@better-auth/passkey@1.6.9",
"@better-auth/oauth-provider@1.6.9",
"@better-auth/mongo-adapter@1.6.9",
"@better-auth/memory-adapter@1.6.9",
"@better-auth/kysely-adapter@1.6.9",
"@better-auth/i18n@1.6.9",
"@better-auth/expo@1.6.9",
"@better-auth/electron@1.6.9",
"@better-auth/drizzle-adapter@1.6.9",
"@better-auth/core@1.6.9",
"@better-auth/api-key@1.6.9",
"v1.6.8",
"better-auth@1.6.8",
"auth@1.6.8",
"@better-auth/test-utils@1.6.8",
"@better-auth/telemetry@1.6.8",
"@better-auth/stripe@1.6.8",
"@better-auth/sso@1.6.8",
"@better-auth/scim@1.6.8",
"@better-auth/redis-storage@1.6.8",
"@better-auth/prisma-adapter@1.6.8",
"@better-auth/passkey@1.6.8",
"@better-auth/oauth-provider@1.6.8",
"@better-auth/mongo-adapter@1.6.8",
"@better-auth/memory-adapter@1.6.8",
"@better-auth/kysely-adapter@1.6.8",
"@better-auth/i18n@1.6.8",
"@better-auth/expo@1.6.8",
"@better-auth/electron@1.6.8",
"@better-auth/drizzle-adapter@1.6.8",
"@better-auth/core@1.6.8",
"@better-auth/api-key@1.6.8",
"v1.6.7",
"better-auth@1.6.7",
"auth@1.6.7",
"@better-auth/test-utils@1.6.7",
"@better-auth/telemetry@1.6.7",
"@better-auth/stripe@1.6.7",
"@better-auth/sso@1.6.7",
"@better-auth/scim@1.6.7",
"@better-auth/redis-storage@1.6.7",
"@better-auth/prisma-adapter@1.6.7",
"@better-auth/passkey@1.6.7",
"@better-auth/oauth-provider@1.6.7",
"@better-auth/mongo-adapter@1.6.7",
"@better-auth/memory-adapter@1.6.7",
"@better-auth/kysely-adapter@1.6.7",
"@better-auth/i18n@1.6.7",
"@better-auth/expo@1.6.7",
"@better-auth/electron@1.6.7",
"@better-auth/drizzle-adapter@1.6.7",
"@better-auth/core@1.6.7",
"@better-auth/api-key@1.6.7",
"v1.6.6",
"better-auth@1.6.6",
"auth@1.6.6",
"@better-auth/test-utils@1.6.6",
"@better-auth/telemetry@1.6.6",
"@better-auth/stripe@1.6.6",
"@better-auth/sso@1.6.6",
"@better-auth/scim@1.6.6",
"@better-auth/redis-storage@1.6.6",
"@better-auth/prisma-adapter@1.6.6",
"@better-auth/passkey@1.6.6",
"@better-auth/oauth-provider@1.6.6",
"@better-auth/mongo-adapter@1.6.6",
"@better-auth/memory-adapter@1.6.6",
"@better-auth/kysely-adapter@1.6.6",
"@better-auth/i18n@1.6.6",
"@better-auth/expo@1.6.6",
"@better-auth/electron@1.6.6",
"@better-auth/drizzle-adapter@1.6.6",
"@better-auth/core@1.6.6",
"@better-auth/api-key@1.6.6",
"v1.6.5",
"better-auth@1.6.5",
"auth@1.6.5",
"@better-auth/test-utils@1.6.5",
"@better-auth/telemetry@1.6.5",
"@better-auth/stripe@1.6.5",
"@better-auth/sso@1.6.5",
"@better-auth/scim@1.6.5",
"@better-auth/redis-storage@1.6.5",
"@better-auth/prisma-adapter@1.6.5",
"@better-auth/passkey@1.6.5",
"@better-auth/oauth-provider@1.6.5",
"@better-auth/mongo-adapter@1.6.5",
"@better-auth/memory-adapter@1.6.5",
"@better-auth/kysely-adapter@1.6.5",
"@better-auth/i18n@1.6.5",
"@better-auth/expo@1.6.5",
"@better-auth/electron@1.6.5",
"@better-auth/drizzle-adapter@1.6.5",
"@better-auth/core@1.6.5",
"@better-auth/api-key@1.6.5",
"v1.6.4",
"better-auth@1.6.4",
"auth@1.6.4",
"@better-auth/test-utils@1.6.4",
"@better-auth/telemetry@1.6.4",
"@better-auth/stripe@1.6.4",
"@better-auth/sso@1.6.4",
"@better-auth/scim@1.6.4",
"@better-auth/redis-storage@1.6.4",
"@better-auth/prisma-adapter@1.6.4",
"@better-auth/passkey@1.6.4",
"@better-auth/oauth-provider@1.6.4",
"@better-auth/mongo-adapter@1.6.4",
"@better-auth/memory-adapter@1.6.4",
"@better-auth/kysely-adapter@1.6.4",
"@better-auth/i18n@1.6.4",
"@better-auth/expo@1.6.4",
"@better-auth/electron@1.6.4",
"@better-auth/drizzle-adapter@1.6.4",
"@better-auth/core@1.6.4",
"@better-auth/api-key@1.6.4",
"v1.6.3",
"better-auth@1.6.3",
"auth@1.6.3",
"@better-auth/test-utils@1.6.3",
"@better-auth/telemetry@1.6.3",
"@better-auth/stripe@1.6.3",
"@better-auth/sso@1.6.3",
"@better-auth/scim@1.6.3",
"@better-auth/redis-storage@1.6.3",
"@better-auth/prisma-adapter@1.6.3",
"@better-auth/passkey@1.6.3",
"@better-auth/oauth-provider@1.6.3",
"@better-auth/mongo-adapter@1.6.3",
"@better-auth/memory-adapter@1.6.3",
"@better-auth/kysely-adapter@1.6.3",
"@better-auth/i18n@1.6.3",
"@better-auth/expo@1.6.3",
"@better-auth/electron@1.6.3",
"@better-auth/drizzle-adapter@1.6.3",
"@better-auth/core@1.6.3",
"@better-auth/api-key@1.6.3",
"v1.6.2",
"better-auth@1.6.2",
"auth@1.6.2",
"@better-auth/test-utils@1.6.2",
"@better-auth/telemetry@1.6.2",
"@better-auth/stripe@1.6.2",
"@better-auth/sso@1.6.2",
"@better-auth/scim@1.6.2",
"@better-auth/redis-storage@1.6.2",
"@better-auth/prisma-adapter@1.6.2",
"@better-auth/passkey@1.6.2",
"@better-auth/oauth-provider@1.6.2",
"@better-auth/mongo-adapter@1.6.2",
"@better-auth/memory-adapter@1.6.2",
"@better-auth/kysely-adapter@1.6.2",
"@better-auth/i18n@1.6.2",
"@better-auth/expo@1.6.2",
"@better-auth/electron@1.6.2",
"@better-auth/drizzle-adapter@1.6.2",
"@better-auth/core@1.6.2",
"@better-auth/api-key@1.6.2",
"v1.6.1",
"better-auth@1.6.1",
"auth@1.6.1",
"@better-auth/test-utils@1.6.1",
"@better-auth/telemetry@1.6.1",
"@better-auth/stripe@1.6.1",
"@better-auth/sso@1.6.1",
"@better-auth/scim@1.6.1",
"@better-auth/redis-storage@1.6.1",
"@better-auth/prisma-adapter@1.6.1",
"@better-auth/passkey@1.6.1",
"@better-auth/oauth-provider@1.6.1",
"@better-auth/mongo-adapter@1.6.1",
"@better-auth/memory-adapter@1.6.1",
"@better-auth/kysely-adapter@1.6.1",
"@better-auth/i18n@1.6.1",
"@better-auth/expo@1.6.1",
"@better-auth/electron@1.6.1",
"@better-auth/drizzle-adapter@1.6.1",
"@better-auth/core@1.6.1",
"@better-auth/api-key@1.6.1",
"v1.6.0",
"better-auth@1.6.0",
"auth@1.6.0",
"@better-auth/test-utils@1.6.0",
"@better-auth/telemetry@1.6.0",
"@better-auth/stripe@1.6.0",
"@better-auth/sso@1.6.0",
"@better-auth/scim@1.6.0",
"@better-auth/redis-storage@1.6.0",
"@better-auth/prisma-adapter@1.6.0",
"@better-auth/passkey@1.6.0",
"@better-auth/oauth-provider@1.6.0",
"@better-auth/mongo-adapter@1.6.0",
"@better-auth/memory-adapter@1.6.0",
"@better-auth/kysely-adapter@1.6.0",
"@better-auth/i18n@1.6.0",
"@better-auth/expo@1.6.0",
"@better-auth/electron@1.6.0",
"@better-auth/drizzle-adapter@1.6.0",
"@better-auth/core@1.6.0",
"@better-auth/api-key@1.6.0",
"v1.5.7-beta.1",
"v1.5.1-beta.4",
"v1.5.1-beta.3",
"v1.5.1-beta.2",
"v1.5.1-beta.1",
"v1.5.0-beta.20",
"v1.5.0-beta.19",
"v1.5.0-beta.18",
"v1.5.0-beta.17",
"v1.5.0-beta.16",
"v1.5.0-beta.15",
"v1.5.0-beta.14",
"v1.5.0-beta.13",
"v1.5.0-beta.12",
"v1.5.0-beta.11",
"v1.5.0-beta.10",
"v1.5.0-beta.9",
"v1.5.0-beta.8",
"v1.5.0-beta.7",
"v1.5.0-beta.6",
"v1.5.0-beta.5",
"v1.5.0-beta.4",
"v1.5.0-beta.3",
"v1.5.0-beta.2",
"v1.5.0-beta.1",
"v1.4.8-beta.7",
"v1.4.8-beta.6",
"v1.4.8-beta.5",
"v1.4.8-beta.4",
"v1.4.8-beta.3",
"v1.4.8-beta.2",
"v1.4.8-beta.1",
"v1.4.7-beta.4",
"v1.4.7-beta.3",
"v1.4.7-beta.2",
"v1.4.7-beta.1",
"v1.4.6-beta.3",
"v1.4.6-beta.2",
"v1.4.6-beta.1",
"v1.4.5-beta.2",
"v1.4.5-beta.1",
"v1.4.4-beta.3",
"v1.4.4-beta.1",
"v1.4.2-beta.5",
"v1.4.2-beta.4",
"v1.4.2-beta.3",
"v1.4.2-beta.2",
"v1.4.1-beta.1",
"v1.4.0-beta.27",
"v1.4.0-beta.26",
"v1.4.0-beta.25",
"v1.4.0-beta.24",
"v1.4.0-beta.23",
"v1.4.0-beta.22",
"v1.4.0-beta.21",
"v1.4.0-beta.20",
"v1.4.0-beta.19",
"v1.4.0-beta.18"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-110862.json"
}
}
],
"modified": "2026-10-28T02:30:31.895152563Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/110xxx/CVE-2026-110862.json",
"https://github.com/better-auth/better-auth/security/advisories/GHSA-965c-763c-88jm",
"https://nvd.nist.gov/vuln/detail/CVE-2026-110862",
"https://www.vulncheck.com/advisories/better-auth-1.4.0-beta.18-before-1.7.7-authentication-bypass-via-magic-link"
],
"provider_metadata": {
"cwe_ids": [
"CWE-287"
],
"cna_assigner": "VulnCheck",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/110xxx/CVE-2026-110862.json"
}
},
"related_cves": [
{
"value": "CVE-2026-110862",
"evidence": "/id"
},
{
"value": "CVE-2026-114607",
"evidence": "/aliases"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 499121,
"published_at": "2026-10-14T22:52:46.811+00:00"
}