CVE-2026-45337

Description

Better Auth: Device authorization approve and deny accept any authenticated session while the user code is pending

Description (MITRE) cveawg.mitre.org

Pulled from cveawg.mitre.org/api/cve/CVE-2026-45337 on 2026-07-31. Shown when MITRE's text differs from the cvelistV5 mirror.

Better Auth is an authentication and authorization library for TypeScript. From 1.6.0 until 1.6.11, the deviceAuthorization plugin treats any authenticated session as the owner of any pending device code because GET /device does not claim the row and POST /device/approve and POST /device/deny short-circuit when userId is unset, allowing an authenticated attacker who learns a valid user_code to bind the polling device to the attacker's account or deny the legitimate flow. This issue is fixed in version 1.6.11.

Overview

State

—

Assigner (CNA)

—

CVSS severity

high

CVSS score

7.6 / 10

CVSS vector

AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:L

Effective score

7.6 / 10 HIGH source: CNA overview

CWE(s)

—

Reserved

—

Published

—

Last updated

—

Source

https://www.tenable.com/cve/CVE-2026-45337

Linked Threat

CVE-2026-45337 — CVE-2026-45337

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published

2026-07-15 18:16:45 UTC

NVD last modified

2026-07-21 04:21:25 UTC

NVD CVSS v3.1

7.6 / 10 HIGH source: security-advisories@github.com

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:L

Exploitability subscore

2.1 / 10

Impact subscore

5.5 / 10

EPSS score

0.0014 (probability of exploitation in next 30 days)

EPSS percentile

3.85% vs all CVEs — higher = more likely to be exploited, as of 2026-07-30

NVD-assigned CWE(s): CWE-285, CWE-345 (differs from the CNA list above)

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID

EUVD-2026-44743

Assigner

GitHub_M

Published

Jul 15, 2026, 5:31:44 PM

Updated

Jul 15, 2026, 6:02:58 PM

EUVD base score (CVSS 3.1)

7.6 / 10
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:L

EUVD-reported EPSS

0.1400

Vendors

better-auth

Products

better-auth (1.6.0, < 1.6.11)

Aliases

GHSA-cq3f-vc6p-68fh

ENISA description: Better Auth is an authentication and authorization library for TypeScript. From 1.6.0 until 1.6.11, the deviceAuthorization plugin treats any authenticated session as the owner of any pending device code because GET /device does not claim the row and POST /device/approve and POST /device/deny short-circuit when userId is unset, allowing an authenticated attacker who learns a valid user_code to bind the polling device to the attacker's account or deny the legitimate flow. This issue is fixed in version 1.6.11.

Vendor references (0)

References embedded in the original CVE record by the assigning CNA.

None in the CVE record.

MITRE references (4) cveawg.mitre.org

Pulled from MITRE's CVE Services API by the 🛰 Backfill from MITRE button.

• https://github.com/better-auth/better-auth/commit/99a254a79b59d5a3f5ca2123260118cddb5beed7 x_refsource_MISC
• https://github.com/better-auth/better-auth/pull/9573 x_refsource_MISC
• https://github.com/better-auth/better-auth/releases/tag/v1.6.11 x_refsource_MISC
• https://github.com/better-auth/better-auth/security/advisories/GHSA-cq3f-vc6p-68fh x_refsource_CONFIRM

Web references (2)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

• https://nvd.nist.gov/vuln/detail/CVE-2026-45337 tenable:nvd.nist.gov
• https://www.cve.org/CVERecord?id=CVE-2026-45337 tenable:www.cve.org

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

• Better Auth: Device authorization approve and deny accept any ...
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  2026-06-19 02:34 UTC
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  2026-06-19 02:34 UTC
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  web:www.oracle.com

  This Critical Security Patch Update contains 35 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Security Patch Update and other Oracle Software Security Assurance activities is located at May 2026 Critical Security Patch Update: Executive Summary and Analysis.

  2026-06-19 02:34 UTC
• Patch Tuesday - June 2026 - Rapid7
  web:www.rapid7.com

  Microsoft is publishing 200 vulnerabilities on June 2026 Patch Tuesday, including an HTTP/2 denial of service vulnerability and an elevation of privilege vulnerability in PowerToys.

  2026-06-19 02:34 UTC
• OpenSSL Patches High-Severity Vulnerability Found With AI
  web:www.securityweek.com

  The latest OpenSSL releases patch 18 vulnerabilities, including a high-severity issue that could allow remote code execution. The high-severity vulnerability, tracked as CVE - 2026 -45447, is a heap user-after-free bug in a function used for PKCS#7 (Public-Key Cryptography Standard #7) verification. Discovered by a Calif researcher in collaboration with Claude AI and Anthropic Research, the bug ...

  2026-06-19 02:34 UTC
• Patch Tuesday June 2026: Security Updates & CVE Analysis
  web:zecurit.com

  Get the complete breakdown of Microsoft's June 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .

  2026-06-19 02:34 UTC

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