CVE-2026-54299: high-severity vulnerability in withastro astro
Astro: Host-header full-read SSRF in core prerendered error-page fetch (prerenderedErrorPageFetch default + unvalidated createRequestFromNodeRequest URL)
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5epss 0.3%
Astro is a web framework. Prior to 6.4.6, Astro SSR apps with prerendered error pages (/404 or /500 using export const prerender = true) fetch those pages over HTTP at runtime when an error occurs. The URL for this fetch is derived from request.url, which in turn gets its origin from the incoming Host header. When the Host header is not validated against allowedDomains, an attacker can point the fetch at an arbitrary host and read the response. This vulnerability is fixed in 6.4.6.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N
Affected products
withastro · astroRelated CVEs — withastro astro
In the same product, most dangerous first.
CVE-2026-25545MEDIUMAstro has Full-Read SSRF in error rendering via Host: header injectionEPSS 1.9%CVE-2024-56159HIGHServer source code is exposed to the public if sourcemaps are enabledEPSS 1.5%CVE-2025-64525MEDIUMAstro: URL manipulation via unsanitized headers leads to path-based middleware protections bypass, potential SSRF/cache-poisoning, CVE-2025-61925 bypassEPSS 1.2%CVE-2025-58179HIGHAstro Cloudflare adapter is vulnerable to Server-Side Request Forgery via /_image endpointEPSS 0.9%CVE-2026-84376MEDIUMAstro: Authorization bypass from missing path-segment boundary check when stripping the configured baseEPSS 0.7%CVE-2025-54793MEDIUMAstro: Duplicate trailing slash feature can lead to Open RedirectsEPSS 0.7%