MGASA-2026-0226 Updated ruby-rack packages fix security vulnerabilities

CVE-2026-26961 Greedy multipart boundary parsing can cause parser differentials and WAF bypass. Forwarded header semicolon injection enables Host and Scheme spoofing. CVE-2026-34230 Quadratic complexity in Rack::Utils.selectbestencoding via wildcard Accept-Encoding header. CVE-2026-34763 Root...

Updated ruby-rack packages fix security vulnerabilities

CVE-2026-26961 Greedy multipart boundary parsing can cause parser differentials and WAF bypass. Forwarded header semicolon injection enables Host and Scheme spoofing. CVE-2026-34230 Quadratic complexity in Rack::Utils.selectbestencoding via wildcard Accept-Encoding header. CVE-2026-34763 Root...

CVE-2026-34786

Vulnerability summary: CVE-2026-34786 affects Rack’s static file serving. Prior to versions 2.2.23, 3.1.21, and 3.2.6, Rack::Static#applicable_rules compares header_rules against the raw URL-encoded PATH_INFO while the file path is decoded for serving. This can allow a URL-encoded path variant to...

PT-2026-29919

Summary Rack::Staticapplicable rules evaluates several header rules types against the raw URL-encoded PATH INFO, while the underlying file-serving path is decoded before the file is served. As a result, a request for a URL-encoded variant of a static path can serve the same file without the heade...