CVE Watch20 jul 2026

CVE-2026-45797

HeyForm is an open-source form builder. Prior to version 3.0.0-rc.7, the `/api/upload` endpoint allows unauthenticated file uploads includin

CVSS

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Sin CVSS

EPSS

0.4%

p33

KEV

—

Exploit Today

0-100

Publicado: 20 jul 2026 · Última mod.: 20 jul 2026 · CWE-79 · CWE-434

EPSS · 30d

Sin historial EPSS suficiente todavía.

Descripción técnica

HeyForm is an open-source form builder. Prior to version 3.0.0-rc.7, the `/api/upload` endpoint allows unauthenticated file uploads including SVG files. Uploaded SVGs are stored in the static assets directory and served with `Content-Type: image/svg+xml` by Express's serve-static middleware, allowing an attacker to achieve stored cross-site scripting (XSS) on the heyform domain without any authentication. Version 3.0.0-rc.7 contains a patch for the issue.

Referencias oficiales

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