Possible DoS Vulnerability with Range Header in Rack

There is a possible DoS vulnerability relating to the Range request header in Rack. This vulnerability has been assigned the CVE identifier CVE-2024-26141.

Versions Affected: >= 1.3.0. Not affected: < 1.3.0 Fixed Versions:,


Carefully crafted Range headers can cause a server to respond with an unexpectedly large response. Responding with such large responses could lead to a denial of service issue.

Vulnerable applications will use the Rack::File middleware or the Rack::Utils.byte_ranges methods (this includes Rails applications).


The fixed releases are available at the normal locations.


There are no feasible workarounds for this issue.


To aid users who aren’t able to upgrade immediately we have provided patches for the two supported release series. They are in git-am format and consist of a single changeset.

  • 3-0-range.patch - Patch for 3.0 series
  • 2-2-range.patch - Patch for 2.2 series


Thank you ooooooo_q for the report and patch

2-2-range.patch (1.4 KB) 3-0-range.patch (1.3 KB)

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