UBUNTU-CVE-2026-120421

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    UBUNTU-CVE-2026-120421

    Published: 5 Nov 2026Last Modified: 6 Nov 2026
    Upstream:
    CVE-2026-120421

    Summary:

    Details: In Eclipse Mojarra versions 2.2.0 through 4.0.28, 4.1.0 through 4.1.19, and 5.0.0-M1 through 5.0.0-M11, when URL client window mode is enabled (`jakarta.faces.CLIENT_WINDOW_MODE=url`), the client window id from the `jfwid` or `jakarta.faces.ClientWindow` request parameter is appended to generated URLs without URL-encoding. `h:button` renders such a URL into a JavaScript string literal, which allows reflected cross-site scripting. With `com.sun.faces.enableCspNonce=true`, the injected script runs on page load inside the nonce script element, bypassing the Content Security Policy.

    References: https://ubuntu.com/security/CVE-2026-120421, https://www.cve.org/CVERecord?id=CVE-2026-120421, https://gitlab.eclipse.org/security/cve-assignment/-/work_items/536, https://gitlab.eclipse.org/security/vulnerability-reports/-/work_items/1332

    Affected packages

    Package

    Name: mojarra

    Purl: pkg:deb/ubuntu/mojarra?arch=source&distro=xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    2.2.8-1
    2.2.8-2

    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
    UBUNTU-CVE-2026-120421 | CVE-DB