CVE-2026-27902

MediumCVSS 5.4/10Last modified Jun 17, 2026

Description

Svelte performance oriented web framework. Prior to version 5.53.5, errors from `transformError` were not correctly escaped prior to being embedded in the HTML output, causing potential HTML injection and XSS if attacker-controlled content is returned from `transformError`. Version 5.53.5 fixes the issue.

Metrics

CVSS 3.1 5.4/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

Weakness enumeration

CWE-79

Affected software

Vendor	Product	Versions
sveltejs	svelte	>= 5.53.0, < 5.53.5

References

Timeline

Published: Feb 26, 2026
Last modified: Jun 17, 2026
NVD status: Analyzed

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