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CVE-2026-27902

Svelte Vulnerable to XSS via HTML Comment Injection in SSR Error Boundary Hydration Markers PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
sveltejs / svelteaffected >= 5.53.0, < 5.53.5

CWE

CWE-79

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.