{"cve":"CVE-2026-9658","nvd":{"published":"2026-05-28T13:16:25.067","modified":"2026-10-26T11:10:00.157","status":"Deferred","description":"Plack::Middleware::Security::Common versions before 0.13.1 for Perl did not block header injections in request paths.\n\nThe header injection rule was ineffective at blocking header injections in the request paths unless they were double-encoded, for example,\n\n  GET /path\\r\\nHTTP/1.1\\r\\nHost: secret.example.com\n\nNote 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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","score":7.3},"cwes":["CWE-113","CWE-790"],"references":["https://metacpan.org/release/RRWO/Plack-Middleware-Security-Simple-v0.13.1/changes","http://www.openwall.com/lists/oss-security/2026/05/28/9"],"products":[],"source":"nvd","synced_at":"2026-10-26T11:33:08.859761529+00:00"},"epss":{"cve":"CVE-2026-9658","score":0.00226,"percentile":0.13228,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}