What is CVE-2026-41067?

CVE-2026-41067 is a medium-severity vulnerability in Withastro Astro, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-04-24.

How severe is CVE-2026-41067?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Withastro Astro

CVE-2026-41067

Astro is a web framework. Prior to 6.1.6, the defineScriptVars function in Astro's server-side rendering pipeline uses a case-sensitive regex /<\/script>/g to sanitize values injected into inline <script> tags via the define:vars directive…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.000 (12.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Withastro Astro — versions < 6.1.6

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

https://github.com/withastro/astro/security/advisories/GHSA-j687-52p2-xcff (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-41067?: CVE-2026-41067 is a medium-severity vulnerability in Withastro Astro, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-04-24.
How severe is CVE-2026-41067?: Medium severity. CVSS v3 base score is 6.1 out of 10.