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CVE-2026-53518

🗓️ 15 Jul 2026 17:17:06Reported by GitHub_MType 
cve
 cve
🔗 web.nvd.nist.gov👁 19 Views🌐 WEB

Better Auth OAuth provider race in authorization code exchange enables multi-use code redemption; fixed in 1.6.11.

Related
Detection
Affected
Refs
Paths
NVD
Vulners
Node
OR
better-authbetter-auth/oauth-providerRange1.6.01.6.11node.js
better-authbetter_authRange1.6.01.6.11node.js
[
  {
    "vendor": "better-auth",
    "product": "better-auth",
    "versions": [
      {
        "version": ">= 1.6.0, < 1.6.11",
        "status": "affected"
      }
    ]
  }
]
ParameterPositionPathDescriptionCWE
coderequest body/oauth2/tokenRace condition in redeeming single-use authorization codes in authorization_code flow allows two concurrent requests to pass the read step and mint independent tokens due to non-atomic find-then-delete sequence (affecting token issuance).CWE-362CWE-367
grant_typerequest body/oauth2/tokenRace condition in redeeming single-use authorization codes in authorization_code flow allows two concurrent requests to pass the read step and mint independent tokens due to non-atomic find-then-delete sequence (affecting token issuance).CWE-362CWE-367
redirect_urirequest body/oauth2/tokenRace condition in redeeming single-use authorization codes in authorization_code flow allows two concurrent requests to pass the read step and mint independent tokens due to non-atomic find-then-delete sequence (affecting token issuance).CWE-362CWE-367
client_idrequest body/oauth2/tokenRace condition in redeeming single-use authorization codes in authorization_code flow allows two concurrent requests to pass the read step and mint independent tokens due to non-atomic find-then-delete sequence (affecting token issuance).CWE-362CWE-367
client_secretrequest body/oauth2/tokenRace condition in redeeming single-use authorization codes in authorization_code flow allows two concurrent requests to pass the read step and mint independent tokens due to non-atomic find-then-delete sequence (affecting token issuance).CWE-362CWE-367
coderequest body/mcp/tokenRace condition in redeeming single-use authorization codes in authorization_code flow allows two concurrent requests to pass the read step and mint independent tokens due to non-atomic find-then-delete sequence (affecting token issuance).CWE-362CWE-367
grant_typerequest body/mcp/tokenRace condition in redeeming single-use authorization codes in authorization_code flow allows two concurrent requests to pass the read step and mint independent tokens due to non-atomic find-then-delete sequence (affecting token issuance).CWE-362CWE-367
redirect_urirequest body/mcp/tokenRace condition in redeeming single-use authorization codes in authorization_code flow allows two concurrent requests to pass the read step and mint independent tokens due to non-atomic find-then-delete sequence (affecting token issuance).CWE-362CWE-367
client_idrequest body/mcp/tokenRace condition in redeeming single-use authorization codes in authorization_code flow allows two concurrent requests to pass the read step and mint independent tokens due to non-atomic find-then-delete sequence (affecting token issuance).CWE-362CWE-367
client_secretrequest body/mcp/tokenRace condition in redeeming single-use authorization codes in authorization_code flow allows two concurrent requests to pass the read step and mint independent tokens due to non-atomic find-then-delete sequence (affecting token issuance).CWE-362CWE-367
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