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Advisories

filebrowser 2.24.0 Race Condition via TUS concurrent PATCH uploads

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severity
low
date
Affecting

  • filebrowser >= 0, < 2.24.0

CWE
  • CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition
CVSS
2.3
CVSS V4 Vector
CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Credit
skeletonsec
Description
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.

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