CVE-2026-54179 Laravel Backpack CRUD: SingleBase64Image accepts any base64 payload behind a `data:image` prefix — SVG-with-script lands on the public disk
An authenticated administrator can upload malicious SVG files with scripts via base64 payloads, leading to stored XSS or code execution.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-54179?
CVE-2026-54179 is a medium-severity vulnerability in Laravel-Backpack CRUD, published on 31 Aug 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official 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.
Which versions are affected by CVE-2026-54179?
4 open source packages ship an affected version, including backpack/crud.
| Package | Affected | Fixed in |
|---|---|---|
backpack/crud Packagist | From 6.0.0 | 6.8.14 |
backpack/crud Packagist | From 6.0.0 | 6.8.14 |
backpack/crud Packagist | From 7.0.0 | 7.0.38 |
backpack/crud Packagist | From 7.0.0 | 7.0.38 |
How do I fix CVE-2026-54179?
Upgrade backpack/crud to a fixed version for your release line: 6.8.14 or 7.0.38.
Is CVE-2026-54179 being exploited?
There is no known exploitation of CVE-2026-54179 in the wild and no public exploit code.
Sources
Also known as GHSA-8hw4-7qjr-3wxg.