CVE-2026-8467
Gravedad CVSS v4.0:
CRÍTICA
Tipo:
CWE-94
Control incorrecto de generación de código (Inyección de código)
Fecha de publicación:
20/05/2026
Última modificación:
20/05/2026
Descripción
*** Pendiente de traducción *** Code Injection vulnerability in phenixdigital phoenix_storybook allows unauthenticated remote code execution via unsanitized attribute value interpolation in HEEx template generation.<br />
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The psb-assign WebSocket event handler in &#39;Elixir.PhoenixStorybook.Story.PlaygroundPreviewLive&#39;:handle_event/3 accepts arbitrary attribute names and values from unauthenticated clients. These values are passed to &#39;Elixir.PhoenixStorybook.Helpers.ExtraAssignsHelpers&#39;:handle_set_variation_assign/3, which stores them verbatim. When rendering, &#39;Elixir.PhoenixStorybook.Rendering.ComponentRenderer&#39;:attributes_markup/1 interpolates binary attribute values directly into a HEEx template string as name="" without escaping double quotes or HEEx expression delimiters. An attacker can supply a value containing a closing quote followed by a HEEx expression block (e.g. foo" injected={EXPR} bar="), which causes EXPR to be treated as an inline Elixir expression. The resulting template is compiled via EEx.compile_string/2 and executed via Code.eval_quoted_with_env/3 with full Kernel imports and no sandbox, giving the attacker arbitrary code execution on the server.<br />
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This issue affects phoenix_storybook from 0.5.0 before 1.1.0.
Impacto
Puntuación base 4.0
9.50
Gravedad 4.0
CRÍTICA