VYPR
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Moderate severityOSV Advisory· Published Jan 15, 2026· Updated Jan 15, 2026

Svelte 5.46.0 - Hydratable Key Script-Breakout XSS (SSR)

CVE-2025-15265

Description

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
sveltenpm
>= 5.46.0, < 5.46.45.46.4

Affected products

2

Patches

Vulnerability mechanics

References

6

News mentions

0

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