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CVE-2026-73425— @astrojs/netlify generates an overly-broad Netlify Image CDN allowlist because remotePatterns.pathname metacharacters are not escaped

CVSS 3.7 · Low EPSS 0.17% · P7

Affected Version Matrix 1

VendorProductVersion RangeStatus
withastroastro< 8.1.2affected
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I. Basic Information for CVE-2026-73425

Vulnerability Information
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Vulnerability Title
@astrojs/netlify generates an overly-broad Netlify Image CDN allowlist because remotePatterns.pathname metacharacters are not escaped
Source: CVE Program / CVE List V5
Vulnerability Description
Astro is a web framework for content-driven websites. Prior to 8.1.2, the Astro Netlify adapter converts each image.remotePatterns entry into a regular expression written to .netlify/v1/config.json under images.remote_images for Netlify's Image CDN allowlist. In packages/integrations/netlify/src/index.ts, remotePatternToRegex() escapes dots in hostname values but interpolates literal pathname values without escaping regular expression metacharacters such as ., +, ?, (, and [, so a restrictive pathname such as /img/v1.0/file also matches metacharacter-adjacent paths, including paths that cross a segment. Netlify enforces the generated regular expression directly and Astro's matchPattern() helper does not revalidate the request, allowing optimization of images on an already-allowed host that the declared pathname was intended to exclude. This issue is fixed in version 8.1.2.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
不正确的正则表达式
Source: CVE Program / CVE List V5
Vulnerability Title
withastro astro 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
withastro astro是withastro组织的一款面向内容网站的现代网页构建框架。 withastro astro 8.1.2之前版本存在输入验证错误漏洞，该漏洞源于Astro Netlify适配器将image.remotePatterns条目转换为正则表达式时未正确转义正则表达式元字符，可能导致攻击者绕过路径限制，优化本应被排除的图片。
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

VendorProductAffected VersionsCPESubscribe
withastroastro < 8.1.2 -

II. Public POCs for CVE-2026-73425

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III. Intelligence Information for CVE-2026-73425

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Vendor Advisories for CVE-2026-73425 (1)

Same Patch Batch · withastro · 2026-08-12 · 3 CVEs total

CVE-2026-734225.3 MEDIUMAstro: Reflected XSS via unescaped View Transition animation properties
CVE-2026-734235.1 MEDIUMAstro: composable `astro/hono` pipeline bypasses `security.checkOrigin` when `middleware()

IV. Related Vulnerabilities

Same product: astro
Same vendor: withastro
Same weakness: CWE-185

V. Comments for CVE-2026-73425

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