CVE-2026-42551: high-severity vulnerability in flightphp core
Flight: HTTP method override enabled by default enables CSRF escalation and middleware bypass in flightphp/core
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5epss 0.4%
Flight is an extensible micro-framework for PHP. Prior to 3.18.1, Request::getMethod() unconditionally honors the X-HTTP-Method-Override header and the $_REQUEST['_method'] parameter on any HTTP verb (including safe verbs such as GET), with no opt-in and no whitelist of permitted target methods. A GET request can silently become a DELETE or PUT, enabling CSRF escalation against destructive endpoints, bypass of middleware gated on unsafe verbs, and cache poisoning between CDN and origin. This vulnerability is fixed in 3.18.1.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Affected products
flightphp · coreRelated CVEs — flightphp core
In the same product, most dangerous first.
CVE-2014-125127HIGHDenial of Service (DoS) vulnerability in mikecao/flightEPSS 0.5%CVE-2026-42550HIGHFlight: SQL Injection via unvalidated identifiers in SimplePdo::insert / update / deleteEPSS 0.5%CVE-2026-42548HIGHFlight: Reflected XSS via unvalidated JSONP callback in Flight::jsonp()EPSS 0.4%CVE-2026-42552HIGHFlight: Sensitive information disclosure via default error handler in flightphp/coreEPSS 0.3%CVE-2026-42549MEDIUMFlight: Path traversal in `make:controller` CLI creates arbitrary directories outside project rootEPSS 0.2%