CVE-2026-48920
Received Received - Intake
Email File Read Vulnerability in Jenkins Email Extension Plugin

Publication date: 2026-05-27

Last updated on: 2026-05-28

Assigner: Jenkins Project

Description
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.
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Meta Information
Published
2026-05-27
Last Modified
2026-05-28
Generated
2026-06-16
AI Q&A
2026-05-27
EPSS Evaluated
2026-06-15
NVD
CVE-2026-48920
EUVD
EUVD-2026-32511
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
jenkins email_extension to 1925.v1598902b_58dd (inc)
jenkins email_extension 1933.v45cec755423f
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-73 The product allows user input to control or influence paths or file names that are used in filesystem operations.
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Executive Summary

This vulnerability exists in the Jenkins Email Extension Plugin version 1933.v45cec755423f and earlier. It allows attackers who can control the email content to inline images using the `data-inline` attribute with `base64` encoding without any restrictions on the image URLs. Specifically, attackers can specify `file:` URLs for images, which enables them to read arbitrary files from the Jenkins controller's filesystem.

Impact Analysis

The vulnerability can allow an attacker who controls email content to read arbitrary files on the Jenkins controller filesystem by embedding `file:` URLs in inlined images. This can lead to unauthorized disclosure of sensitive information stored on the Jenkins server, potentially exposing credentials, configuration files, or other confidential data.

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