CVE-2026-27591: Winter Form Context User Controlled Override

formGetContext() returns a value derived from the 'form_context' POST parameter, allowing authenticated users to override the server-side form rendering context. Combined with context-specific form field visibility, this lets clients coerce a more permissive context that exposes privileged fields (e.g. role_id, is_superuser, permissions) and persist arbitrar

Provally CuratedPublic repositoryHighHigh confidenceVerifiedApache-2.0php
greprules fetch cve-2026-27591-winter-form-context-user-controlled-override --engine opengrep

Description

formGetContext() returns a value derived from the 'form_context' POST parameter, allowing authenticated users to override the server-side form rendering context. Combined with context-specific form field visibility, this lets clients coerce a more permissive context that exposes privileged fields (e.g. role_id, is_superuser, permissions) and persist arbitrar

Detection target

Not provided

Recommended fix

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False-positive notes

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