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CVE-2026-42551

Flight: HTTP method override enabled by default enables CSRF escalation and middleware bypass in flightphp/core

Published: May 13, 2026Updated: May 14, 2026 Sources: CVE List NVDCWE-436
NVD MITRE
7.5CVSSHIGH
EPSS Score
0.3%
Top 77.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

Description

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 Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:HIntegrity
High
A:NAvailability
None
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Weaknesses

CWE-436

Affected Products

coreflightphp
Library
OSS Libraries / web-framework
flightphposs-projectOSS Librariesaka flight php, flightphp

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

References

https://github.com/flightphp/core/security/advisories/GHSA-vxrr-w42w-w76g
github.com

Timeline

Published
May 13, 2026
Last Updated
May 14, 2026

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