CVE-2026-86117

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    CVE-2026-86117

    Published: 5 Sept 2026Last Modified: 25 Sept 2026

    Summary: Coolify through 4.3.17 OAuth Account Takeover via Unverified Email Matching

    Details: Coolify through 4.3.17 contains an authentication bypass vulnerability in the OAuth callback handler that signs users into existing accounts based solely on email address without verifying provider assertions or binding OAuth identities. Attackers can register a victim's email address on any enabled OAuth provider to obtain authenticated sessions as that user, bypassing password requirements and two-factor authentication.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/86xxx/CVE-2026-86117.json, https://nvd.nist.gov/vuln/detail/CVE-2026-86117, https://www.vulncheck.com/advisories/coolify-through-4.3.17-oauth-account-takeover-via-unverified-email-matching, https://github.com/coollabsio/coolify, https://github.com/coollabsio/coolify/blob/v4.3.17/app/Http/Controllers/OauthController.php, https://github.com/coollabsio/coolify/blob/v4.3.17/routes/web.php, https://github.com/geo-chen/oss/blob/main/coolify.md

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -5ff21103974a30e107ce046190fb478658a214e7

    Affected versions

    v4.3.16
    v4.3.15
    v4.3.14
    v4.3.13
    v4.3.12
    v4.3.11
    v4.3.10
    v4.3.9
    v4.3.8
    v4.3.7
    v4.3.6
    v4.3.5
    v4.3.4
    v4.3.3
    v4.3.2
    v4.3.1
    v4.3.0

    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-2026-86117 | CVE-DB