CVE-2025-49007
mediumpriority · track · 21EPSS 0.006 · 46 %ileEURUUSEPSS · scored 2026-10-27
Rack is a modular Ruby web server interface. Starting in version 3.1.0 and prior to version 3.1.16, there is a denial of service vulnerability in the Content-Disposition parsing component of Rack. This is very similar to the previous security issue CVE-2022-44571. Carefully crafted input can cause Content-Disposition header parsing in Rack to take an unexpected amount of time, possibly resulting in a denial of service attack vector. This header is used typically used in multipart parsing. Any applications that parse multipart posts using Rack (virtually all Rails applications) are impacted. Version 3.1.16 contains a patch for the vulnerability.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5.3–7.5
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (5)
Products and version ranges known to be affected.
advisories (1)
Vendor and ecosystem advisories describing this.
- GHSA-47m2-26rw-j2jwReDoS Vulnerability in Rack::Multipart handle_mime_head2025-06-05ghsa · osvUS
### Summary There is a denial of service vulnerability in the Content-Disposition parsing component of Rack. This is very similar to the previous security issue CVE-2022-44571. ### Details Carefully crafted input can cause Content-Disposition header parsing in Rack to take an unexpected amount of time, possibly resulting in a denial of service attack vector. This header is used typically used in multipart parsing. Any applications that parse multipart posts using Rack (virtually all Rails applications) are impacted. ### Credits Thanks to [scyoon](https://hackerone.com/scyoon) for reporting this to the Rails security team
also known as (4)
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sources
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references (8)
External citations — patches, advisories, analysis.
- https://github.com/rack/rack/tagsPatchcnnvd
- https://nvd.nist.gov/vuln/detail/CVE-2025-49007cnnvd
- https://github.com/rack/rack/commit/4795831a0a310c2d31102749e551b38faab6401fenisa_euvd
- https://github.com/rack/rack/commit/aed514df37e33907df3c971ed3ca9a0a20ac2901enisa_euvd
- https://github.com/rack/rack/security/advisories/GHSA-47m2-26rw-j2jwenisa_euvd
- https://github.com/rack/rack/commit/4795831a0a310c2d31102749e551b38faab6401fPatchnvd
- https://github.com/rack/rack/commit/aed514df37e33907df3c971ed3ca9a0a20ac2901Patchnvd
- https://github.com/rack/rack/security/advisories/GHSA-47m2-26rw-j2jwVendor Advisorynvd
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