GHSA-8cgq-6mh2-7j6v
Escape Sequence Injection vulnerability in Rack lead to Possible Log Injection
Quick fix
GHSA-8cgq-6mh2-7j6v — rack: upgrade to the fixed version with the command below.
bundle update rackDetails
## Summary
`Rack::Sendfile` can be exploited by crafting input that includes newline characters to manipulate log entries.
## Details
The `Rack::Sendfile` middleware logs unsanitized header values from the `X-Sendfile-Type` header. An attacker can exploit this by injecting escape sequences (such as newline characters) into the header, resulting in log injection.
## Impact
This vulnerability can distort log files, obscure attack traces, and complicate security auditing.
## Mitigation
- Update to the latest version of Rack, or - Remove usage of `Rack::Sendfile`.
Are you affected?
Enter the version of the package you're using.
Affected packages
References
- https://github.com/rack/rack/security/advisories/GHSA-8cgq-6mh2-7j6v[WEB]
- https://nvd.nist.gov/vuln/detail/CVE-2025-27111[ADVISORY]
- https://github.com/rack/rack/commit/803aa221e8302719715e224f4476e438f2531a53[WEB]
- https://github.com/rack/rack/commit/aeac570bb8080ca7b53b7f2e2f67498be7ebd30b[WEB]
- https://github.com/rack/rack/commit/b13bc6bfc7506aca3478dc5ac1c2ec6fc53f82a3[WEB]
- https://github.com/rack/rack[PACKAGE]
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rack/CVE-2025-27111.yml[WEB]
- https://lists.debian.org/debian-lts-announce/2025/03/msg00016.html[WEB]