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Vulnerabilities
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CVE-2025-15265

Updated on 15 Jan 2026

Severity

6.1 Medium severity

Details

CVSS score
6.1
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CWE ID
Links
NISTCIRCLRHELUbuntu

Overview

About vulnerability

An SSR XSS exists in async hydration when attacker‑controlled keys are passed to hydratable. The key is embedded inside a 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.

Details

Affected product:
astro , language-server , language-tools , svelte , svelte2tsx
Affected packages:
svelte @ 0.0.1 (+12 more)
An SSR XSS exists in async hydration when attacker‑controlled keys are passed to hydratable. The key is embedded inside a 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.