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CVE-2025-27111

rack: rubygem-rack: Escape Sequence Injection vulnerability in Rack lead to Possible Log Injection

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Severity

Moderate

Red Hat Product Security

5.3

CVSS 3.1

Review impact separately from score.

Published · March 5, 2025

Updated · June 28, 2026

Description

A flaw was found in Rack Rubygem, where the Rack::Sendfile middleware logs unsanitized header values from the X-Sendfile-Type header. This flaw allows an attacker to inject escape sequences, such as newline characters, into the header, resulting in log injection.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

To mitigate this vulnerability, remove usage of Rack::Sendfile.

CVSS / CWE

CVSS 3.1 · 5.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

CWE-117 · Improper Output Neutralization for Logs