Filebrowser up to 2.23.x TUS Upload race condition

Summaryinfo

A vulnerability categorized as problematic has been discovered in Filebrowser up to 2.23.x. This affects an unknown function of the component TUS Upload Handler. Executing a manipulation can lead to race condition. This vulnerability is tracked as CVE-2026-82238. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability classified as problematic was found in Filebrowser up to 2.23.x. This vulnerability affects an unknown functionality of the component TUS Upload Handler. The manipulation with an unknown input leads to a race condition vulnerability. The CWE definition for the vulnerability is CWE-362. The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently. As an impact it is known to affect integrity, and availability. CVE summarizes:

filebrowser from version 2.24.0 contains a race condition in the TUS upload handler that allows authenticated users to write past the declared Upload-Length by sending concurrent PATCH requests. Attackers can send multiple simultaneous PATCH requests at the same offset to bypass length validation, resulting in files that exceed their declared size and triggering completion hooks for oversized uploads.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-82238 since 08/28/2026. The exploitation appears to be easy. The attack can be initiated remotely. There are neither technical details nor an exploit publicly available.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Name

• Filebrowser

Version

• 2.0
• 2.1
• 2.2
• 2.3
• 2.4
• 2.5
• 2.6
• 2.7
• 2.8
• 2.9
• 2.10
• 2.11
• 2.12
• 2.13
• 2.14
• 2.15
• 2.16
• 2.17
• 2.18
• 2.19
• 2.20
• 2.21
• 2.22
• 2.23

Website

• Product: https://github.com/filebrowser/filebrowser/

CPE 2.3info

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CPE 2.2info

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