CVE-2025-15265 — Svelte 5.46.0 - Hydratable Key Script-Breakout XSS (SSR)
An SSR XSS exists in async hydration when attacker‑controlled keys are passed to hydratable. The key is embedded inside a <script> block without HTML‑safe escaping, allowing </s…
Published: 2026-01-15 · CVSS: 5.3 · CVSS 4.0
An SSR XSS exists in async hydration when attacker‑controlled keys are passed to hydratable. The key is embedded inside a <script> block without HTML‑safe escaping, allowing </script> to terminate the script and inject arbitrary JavaScript. This enables remote script execution in users' browsers, with potential for session theft and account compromise. This issue affects Svelte: from 5.46.0 before 5.46.3.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7