medium6.6
CVE-2025-49007
ReDoS Vulnerability in Rack::Multipart handle_mime_head
Impact
### 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
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| rubygems | rack | >= 3.1.0, < 3.1.16 | 3.1.16 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Rack | Rack | from 3.1.0 before 3.1.16 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/rack/rack/commit/4795831a0a310c2d31102749e551b38faab6401f
- https://github.com/rack/rack/commit/aed514df37e33907df3c971ed3ca9a0a20ac2901
- https://github.com/rack/rack/security/advisories/GHSA-47m2-26rw-j2jw
- https://github.com/advisories/GHSA-47m2-26rw-j2jw
- https://nvd.nist.gov/vuln/detail/CVE-2025-49007
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rack/CVE-2025-49007.yml