FKIE_CVE-2026-45337

Vulnerability from fkie_nvd - Published: 2026-07-15 18:16 - Updated: 2026-07-15 19:17
Severity
7.6 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:L
Summary
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.
References
security-advisories@github.comhttps://github.com/better-auth/better-auth/commit/99a254a79b59d5a3f5ca2123260118cddb5beed7
security-advisories@github.comhttps://github.com/better-auth/better-auth/pull/9573
security-advisories@github.comhttps://github.com/better-auth/better-auth/releases/tag/v1.6.11
security-advisories@github.comhttps://github.com/better-auth/better-auth/security/advisories/GHSA-cq3f-vc6p-68fh
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "better-auth",
          "vendor": "better-auth",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 1.6.0, \u003c 1.6.11"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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\u0027s account or deny the legitimate flow. This issue is fixed in version 1.6.11."
    }
  ],
  "id": "CVE-2026-45337",
  "lastModified": "2026-07-15T19:17:15.423",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 7.6,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 2.1,
        "impactScore": 5.5,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-45337",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-07-15T18:02:43.206553Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-07-15T18:16:45.580",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/better-auth/better-auth/commit/99a254a79b59d5a3f5ca2123260118cddb5beed7"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/better-auth/better-auth/pull/9573"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/better-auth/better-auth/releases/tag/v1.6.11"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/better-auth/better-auth/security/advisories/GHSA-cq3f-vc6p-68fh"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-285"
        },
        {
          "lang": "en",
          "value": "CWE-345"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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