CVE-2026-121802

    Dashboard / Vulnerabilities / CVE-2026-121802

    CVE-2026-121802

    Published: 4 Nov 2026Last Modified: 8 Nov 2026

    Summary:

    Details: @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: https://github.com/better-auth/better-auth/blob/main/packages/expo/CHANGELOG.md, https://github.com/better-auth/better-auth/releases/tag/v1.7.16, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/121xxx/CVE-2026-121802.json, https://github.com/better-auth/better-auth/security/advisories/GHSA-4wq4-2ppv-q3hg, https://nvd.nist.gov/vuln/detail/CVE-2026-121802

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -93edae16ebae910f57df360d0f43c2dcfa9f8c20

    Affected versions

    v1.7.15
    v1.7.14
    v1.7.13
    v1.7.12
    v1.7.11
    v1.7.10
    v1.7.9
    v1.7.8
    v1.7.7
    v1.7.6
    v1.7.5
    v1.7.4
    v1.7.3
    v1.7.2
    v1.7.1
    v1.7.0

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2026-121802 | CVE-DB