Here are the direct links to the most serious (High-severity) Astro CVEs: 1. CVE-2024-56159 (High) — Server source code exposure via sourcemaps NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-56159 GitHub Advisory: https://github.com/withastro/astro/security/advisories/GHSA-49w6-73cw-chjr 2. CVE-2025-64764 (High, CVSS 7.1) — Reflected XSS via server islands http://CVE.org: https://www.cve.org/CVERecord?id=CVE-2025-64764 NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-64764 GitHub Advisory: https://github.com/withastro/astro/security/advisories/GHSA-wrwg-2hg8-v723 3. CVE-2026-59731 (High, CVSS 8.2) — Authorization bypass (middleware path checks) Confirmed High in multiple trackers (Snyk, Hacktron, Release Alert) Related GitHub advisory: GHSA-vj59-8hwv-xxmv (searchable on the project’s security page) 4. CVE-2026-54299 (High, CVSS 7.5) — Host-header SSRF in prerendered error pages GitHub Advisory: https://github.com/withastro/astro/security/advisories/GHSA-2pvr-wf23-7pc7 5. CVE-2026-50146 (High, CVSS 7.1) — Reflected XSS via unescaped slot names Confirmed High in trackers and release notes Full official list of all Astro security advisories https://github.com/withastro/astro/security/advisories
Post summary
The post announces several high‑severity Astro CVEs, providing links to advisories and describing each vulnerability’s nature and severity, but does not include exploits, PoC, or active exploitation evidence.
