CVE-2026-41321— @astrojs/cloudflare: SSRF via redirect following in Cloudflare image-binding-transform endpoint
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I. Basic Information for CVE-2026-41321
Vulnerability Information
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Vulnerability Title
@astrojs/cloudflare: SSRF via redirect following in Cloudflare image-binding-transform endpoint
Source: NVD (National Vulnerability Database)
Vulnerability Description
@astrojs/cloudflare is an SSR adapter for use with Cloudflare Workers targets. Prior to 13.1.10, the fetch() call for remote images in packages/integrations/cloudflare/src/utils/image-binding-transform.ts uses the default redirect: 'follow' behavior. This allows the Cloudflare Worker to follow HTTP redirects to arbitrary URLs, bypassing the isRemoteAllowed() domain allowlist check which only validates the initial URL. This vulnerabiity is caused by an incomplete fix for CVE-2025-58179. This vulnerability is fixed in 13.1.10.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
服务端请求伪造(SSRF)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Astro 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Astro是Astro开源的一个内容驱动网站的 web 框架。 Astro 13.1.10之前版本存在代码问题漏洞，该漏洞源于fetch调用使用默认重定向行为，可能导致Cloudflare Worker绕过域名白名单检查。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| withastro | @astrojs/cloudflare | < 13.1.10 | - |
II. Public POCs for CVE-2026-41321
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · withastro · 2026-04-24 · 3 CVEs total
| CVE-2026-41067 | 6.1 MEDIUM | Astro: XSS via incomplete `</script>` sanitization in `define:vars` allows case-insensitiv |
| CVE-2026-41322 | 5.3 MEDIUM | @astrojs/node: Cache Poisoning due to incorrect error handling when if-match header is mal |
IV. Related Vulnerabilities
Same vendor: withastro
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Astro: Memory exhaustion DoS due to missing request body siz
Same weakness: CWE-918
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New API: SSRF Filter Bypass via 0.0.0.0
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