Astrojs Node
CVE-2026-25545
HIGH
GHSA-qq67-mvv5-fw3g
Severity by source
AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Primary rating from GitHub Advisory · only source for this CVE.
CVSS VectorGitHub Advisory
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Lifecycle Timeline
4Blast Radius
ecosystem impact- 1 npm packages depend on @astrojs/node (1 direct, 0 indirect)
Ecosystem-wide dependent count for version 9.5.4.
DescriptionGitHub Advisory
Astro is a web framework. Prior to version 9.5.4, Server-Side Rendered pages that return an error with a prerendered custom error page (eg. 404.astro or 500.astro) are vulnerable to SSRF. If the Host: header is changed to an attacker's server, it will be fetched on /500.html and they can redirect this to any internal URL to read the response body through the first request. An attacker who can access the application without Host: header validation (eg. through finding the origin IP behind a proxy, or just by default) can fetch their own server to redirect to any internal IP. With this they can fetch cloud metadata IPs and interact with services in the internal network or localhost. For this to be vulnerable, a common feature needs to be used, with direct access to the server (no proxies). Version 9.5.4 fixes the issue.
AnalysisAI
Astro web framework versions prior to 9.5.4 contain a server-side request forgery vulnerability in error page handling that allows unauthenticated remote attackers to bypass Host header validation and redirect requests to internal services or cloud metadata endpoints. By manipulating the Host header when accessing prerendered error pages, attackers can read response bodies from internal URLs, cloud metadata services, or localhost resources. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Server-Side Rendered pages with prerendered custom error pages (404.astro, 500.astro) in Astro versions before 9.5.4. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 8.6 (HIGH). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | A remote attacker could exploit this vulnerability to compromise the affected system. |
| Remediation | A vendor patch is available — apply it immediately. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Identify all systems running Astro framework and document current versions; enable enhanced logging on affected applications. …
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