======================================================================== CVE-2026-9658 CPAN Security Group ========================================================================
CVE ID: CVE-2026-9658 Distribution: Plack-Middleware-Security-Simple Versions: before 0.13.1 MetaCPAN: https://metacpan.org/dist/Plack-Middleware-Security-Simple VCS Repo: https://github.com/robrwo/Plack-Middleware-Security-Simple Plack::Middleware::Security::Common versions before 0.13.1 for Perl did not block header injections in request paths Description ----------- Plack::Middleware::Security::Common versions before 0.13.1 for Perl did not block header injections in request paths. The header injection rule was ineffective at blocking header injections in the request paths unless they were double-encoded, for example, GET /path\r\nHTTP/1.1\r\nHost: secret.example.com Note that it is unclear whether request paths with CRLF followed by additional headers would be blocked by reverse proxies, or how they would be processed by Plack-based servers. Problem types ------------- - CWE-790 Improper Filtering of Special Elements - CWE-113 Improper Neutralization of CRLF Sequences in HTTP Headers Workarounds ----------- Use with the the the non_printable_chars rule to block header injections. Solutions --------- Upgrade to 0.13.1 or later. References ---------- https://metacpan.org/release/RRWO/Plack-Middleware-Security-Simple-v0.13.1/changes
