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    CVE-2026-33975

    Twenty is an open source CRM built with NestJS (Node.js). In versions 1.18.0 and earlier, the SSRF protection in twenty-server's SecureHttpClientService can be bypassed using IPv4-mapped IPv6 addresses in URL IP literals. Node.js's URL parser normalizes IPv4-mapped IPv6 addresses to compressed hex form (e.g., ::ffff:169.254.169.254 becomes ::ffff:a9fe:a9fe), but the isPrivateIp utility only recognizes the dotted-decimal notation. As a result, the hex form passes the SSRF check unchecked. Additionally, the socket lookup validation event does not fire for IP literal addresses, bypassing the second validation layer. An authenticated user can reach any internal IP, including cloud metadata endpoints, to exfiltrate credentials such as IAM keys.

    Published:May 5, 2026
    Last Modified:May 6, 2026
    EPS:May 5, 2026
    EPSS Score:0.00038
    CVSS Score:8.3

    Affected Products

    Vendor
    Twenty
    Product
    Twenty

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-664 Server Side Request Forgery

    Related CVEs

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    CVE-2026-55583 (CVSS 7.6) — Twenty is an open-source CRM (customer relationship management) platform. Prior to 2.9.0, Twenty was vulnerabl…
    CVE-2026-46624 (CVSS 9.9) — Twenty is an open source CRM. From 1.7.7 through 1.16.7, a critical Remote Code Execution (RCE) vulnerability …
    CVE-2026-44729 (CVSS 8.7) — Twenty is an open source CRM. In 1.18.0 and earlier, the file serving endpoints in Twenty CRM at /files/* and …
    CVE-2026-35451 (CVSS 5.7) — Twenty is an open source CRM. Prior to 1.20.6, a Stored Cross-Site Scripting (XSS) vulnerability exists in the…
    CVE-2026-27023 (CVSS 5) — Twenty is an open source CRM. Prior to version 1.18, the SSRF protection in SecureHttpClientService validated …
    CVE-2026-26720 (CVSS 9.8) — An issue in Twenty CRM v1.15.0 and before allows a remote attacker to execute arbitrary code via the local.dri…
    CVE-2024-28435 (CVSS 5.4) — The CRM platform Twenty version 0.3.0 is vulnerable to SSRF via file upload.…
    CVE-2024-28434 (CVSS 7.6) — The CRM platform Twenty is vulnerable to stored cross site scripting via file upload in version 0.3.0. A craft…

    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