CVE-2025-27610
Local File Inclusion in Rack::Static
Impact
## Summary `Rack::Static` can serve files under the specified `root:` even if `urls:` are provided, which may expose other files under the specified `root:` unexpectedly. ## Details The vulnerability occurs because `Rack::Static` does not properly sanitize user-supplied paths before serving files. Specifically, encoded path traversal sequences are not correctly validated, allowing attackers to access files outside the designated static file directory. ## Impact By exploiting this vulnerability, an attacker can gain access to all files under the specified `root:` directory, provided they are able to determine then path of the file. ## Mitigation - Update to the latest version of Rack, or - Remove usage of `Rack::Static`, or - Ensure that `root:` points at a directory path which only contains files which should be accessed publicly. It is likely that a CDN or similar static file server would also mitigate the issue.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| rubygems | rack | < 2.2.13 | 2.2.13 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Rack | Rack | before 2.2.13 from 3.0.0 before 3.0.14 from 3.1.0 before 3.1.12 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/rack/rack/commit/50caab74fa01ee8f5dbdee7bb2782126d20c6583
- https://github.com/rack/rack/security/advisories/GHSA-7wqh-767x-r66v
- https://lists.debian.org/debian-lts-announce/2025/03/msg00016.html
- https://github.com/advisories/GHSA-7wqh-767x-r66v
- https://nvd.nist.gov/vuln/detail/CVE-2025-27610
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rack/CVE-2025-27610.yml