CVE-2026-26962

A flaw was found in Rack, a modular Ruby web server interface. Rack::Multipart::Parser incorrectly processes folded multipart part headers, failing to remove embedded carriage return and line feed (CRLF) characters. This can lead to applications that reuse these parsed values in HTTP response headers becoming vulnerable to header injection or response splitting, potentially allowing an attacker to manipulate HTTP responses.

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 for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.