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    CVE-2026-48920

    Jenkins Email Extension Plugin 1933.v45cec755423f and earlier allows inlining images as `base64` in email content by setting the `data-inline` attribute, without restrictions on the image URLs that can be inlined, allowing attackers able to control the email content to specify `file:` URLs for images to read arbitrary files from the Jenkins controller filesystem.

    Published:May 27, 2026
    Last Modified:May 30, 2026
    EPS:May 27, 2026
    EPSS Score:0.00396
    CVSS Score:8.8

    Affected Products

    Vendor
    Jenkins
    Product
    Email Extension
    Vendor
    Jenkins Project
    Product
    Jenkins Email Extension Plugin

    Exploits

    No exploit reference

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    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