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.

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://www.jenkins.io/security/advisory/2026-05-27/#SECURITY-3705	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:jenkins:email_extension::::::jenkins::*
	cpe:2.3:a:jenkins:email_extension:1933.v45cec755423f:::::jenkins::

History

14 Oct 2026, 20:10

Type	Values Removed	Values Added
Summary		(es) El Plugin de Extensión de Correo Electrónico de Jenkins 1933.v45cec755423f y versiones anteriores permite incrustar imágenes como 'base64' en el contenido del correo electrónico al establecer el atributo 'data-inline', sin restricciones en las URL de las imágenes que pueden incrustarse, lo que permite a los atacantes capaces de controlar el contenido del correo electrónico especificar URL 'file:' para las imágenes y así leer archivos arbitrarios del sistema de archivos del controlador de Jenkins.

Information

Published : 2026-05-27 15:16

Updated : 2026-10-14 20:10

NVD link : CVE-2026-48920

Mitre link : CVE-2026-48920

CVE.ORG link : CVE-2026-48920

JSON object : View

Products Affected

jenkins

email_extension

CWE

CWE-73

External Control of File Name or Path

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