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CVE-2026-54179— backpack/crud: SingleBase64Image accepts any base64 payload behind a `data:image` prefix — SVG-with-script lands on the public disk

Quick assessment

Affected
Laravel-Backpack CRUD
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Laravel-Backpack CRUD是Laravel-Backpack组织的一个帮助开发者快速搭建后台增删改查界面的工具。 Laravel-Backpack CRUD 6.0.0至6.8.14之前版本和7.0.0至7.0.38之前版本存在安全漏洞，该漏洞源于未验证数据URI的MIME子类型和解码字节，且文件名生成器对数据URI应用MIME类型检测，可能导致存储型跨站脚本或其他意外行为。

CVSS 4.4 · Medium EPSS 0.26% · P18

Affected Version Matrix 2

VendorProduct Version RangeStatus
Laravel-Backpack CRUD >= 6.0.0, < 6.8.14 affected
>= 7.0.0, < 7.0.38 affected
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I. Basic Information for CVE-2026-54179

Vulnerability Information
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Vulnerability Title
backpack/crud: SingleBase64Image accepts any base64 payload behind a `data:image` prefix — SVG-with-script lands on the public disk
Source: CVE Program / CVE List V5
Vulnerability Description
backpack/crud provides Create, Read, Update & Delete (CRUD) functions for Backpack, a collection of Laravel packages that help users build custom administration panels. From 6.0.0 until 6.8.14 and 7.0.37, the src/app/Library/Uploaders/SingleBase64Image.php methods SingleBase64Image::uploadFiles and SingleBase64Image::uploadRepeatableFiles, used by image fields through withFiles(), accept any data URI beginning with data:image without validating the declared MIME subtype or decoded bytes, while src/app/Library/Uploaders/Support/FileNameGenerator.php method FileNameGenerator::getExtensionFromFile applies mime_content_type() to the data URI instead of the decoded content. An authenticated administrator can therefore store arbitrary file content under an extensionless filename on the configured disk, which can cause stored cross-site scripting or other unintended behavior when the file is served and accessed. This issue is fixed in version 7.0.38 and 6.8.14.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Laravel-Backpack CRUD 任意文件上传漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Laravel-Backpack CRUD是Laravel-Backpack组织的一个帮助开发者快速搭建后台增删改查界面的工具。 Laravel-Backpack CRUD 6.0.0至6.8.14之前版本和7.0.0至7.0.38之前版本存在安全漏洞，该漏洞源于未验证数据URI的MIME子类型和解码字节，且文件名生成器对数据URI应用MIME类型检测，可能导致存储型跨站脚本或其他意外行为。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Laravel-Backpack CRUD >= 6.0.0, < 6.8.14 -

II. Public POCs for CVE-2026-54179

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III. Intelligence Information for CVE-2026-54179

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Patches & Fixes for CVE-2026-54179 (2)

Vendor Advisories for CVE-2026-54179 (1)

Vendor Pages for CVE-2026-54179 (2)

IV. Related Vulnerabilities

Same product: CRUD
Same vendor: Laravel-Backpack
Same weakness: CWE-79