GHSA-8cgq-6mh2-7j6v
Escape Sequence Injection vulnerability in Rack lead to Possible Log Injection
Packages
Details
As written in the advisory (Markdown source, shown as plain text).
## 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`.
References
External links from the advisory. They lead to third-party sites.
- https://github.com/rack/rack/security/advisories/GHSA-8cgq-6mh2-7j6v
- https://nvd.nist.gov/vuln/detail/CVE-2025-27111
- https://github.com/rack/rack/commit/803aa221e8302719715e224f4476e438f2531a53
- https://github.com/rack/rack/commit/aeac570bb8080ca7b53b7f2e2f67498be7ebd30b
- https://github.com/rack/rack/commit/b13bc6bfc7506aca3478dc5ac1c2ec6fc53f82a3
- https://github.com/rack/rack
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rack/CVE-2025-27111.yml
- https://lists.debian.org/debian-lts-announce/2025/03/msg00016.html