Astro is a web framework. In versions 9.0.0 through 9.5.3, a bug in Astro's image pipeline allows bypassing `image.domains` / `image.remotePatterns` restrictions, enabling the server to fetch content from unauthorized remote hosts. Astro provides an `inferSize` option that fetches remote images at render time to determine their dimensions. Remote image fetches are intended to be restricted to domains the site developer has manually authorized (using the `image.domains` or `image.remotePatterns` options). However, when `inferSize` is used, no domain validation is performed — the image is fetched from any host regardless of the configured restrictions. An attacker who can influence the image URL (e.g., via CMS content or user-supplied data) can cause the server to fetch from arbitrary hosts. This allows bypassing `image.domains` / `image.remotePatterns` restrictions to make server-side requests to unauthorized hosts. This includes the risk of server-side request forgery (SSRF) against internal network services and cloud metadata endpoints. Version 9.5.4 fixes the issue.
References
| Link | Resource |
|---|---|
| https://github.com/withastro/astro/commit/e01e98b063e90d274c42130ec2a60cc0966622c9 | Patch |
| https://github.com/withastro/astro/security/advisories/GHSA-cj9f-h6r6-4cx2 | Exploit Vendor Advisory |
Configurations
History
09 Mar 2026, 20:47
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://github.com/withastro/astro/commit/e01e98b063e90d274c42130ec2a60cc0966622c9 - Patch | |
| References | () https://github.com/withastro/astro/security/advisories/GHSA-cj9f-h6r6-4cx2 - Exploit, Vendor Advisory | |
| Summary |
|
|
| CPE | cpe:2.3:a:astro:\@astrojs\/node:*:*:*:*:*:node.js:*:* | |
| First Time |
Astro \@astrojs\/node
Astro |
26 Feb 2026, 01:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-02-26 01:16
Updated : 2026-03-09 20:47
NVD link : CVE-2026-27829
Mitre link : CVE-2026-27829
CVE.ORG link : CVE-2026-27829
JSON object : View
Products Affected
astro
- \@astrojs\/node
CWE
CWE-918
Server-Side Request Forgery (SSRF)
