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CVE-2026-84376— Astro: Authorization bypass from missing path-segment boundary check when stripping the configured base

Quick assessment

Affected
withastro astro
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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 7.2.4之前版本存在输入验证错误漏洞，该漏洞源于对请求路径名的字符串前缀检查未验证路径段边界，可能导致未经身份验证的远程攻击者绕过基于路径名的中间件授权并访问受保护路由。

CVSS 6.3 · Medium EPSS 0.41% · P34

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
withastro astro < 7.2.4 affected
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I. Basic Information for CVE-2026-84376

Vulnerability Information
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Vulnerability Title
Astro: Authorization bypass from missing path-segment boundary check when stripping the configured base
Source: CVE Program / CVE List V5
Vulnerability Description
Astro is a web framework for content-driven websites. Prior to 7.2.4, Astro stripped a configured non-root base path from request pathnames using a string-prefix check without verifying a path-segment boundary. With base "/app", a request to "/appX/admin" resolved internally to the protected "/admin" route while middleware observed "/appX/admin" in context.url.pathname. In applications that authorize base-prefixed routes by inspecting context.url.pathname, an unauthenticated remote attacker could bypass pathname-based middleware authorization and reach protected routes. This issue is fixed in version 7.2.4.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
部分比较
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 7.2.4之前版本存在输入验证错误漏洞，该漏洞源于对请求路径名的字符串前缀检查未验证路径段边界，可能导致未经身份验证的远程攻击者绕过基于路径名的中间件授权并访问受保护路由。
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 astro < 7.2.4 -

II. Public POCs for CVE-2026-84376

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III. Intelligence Information for CVE-2026-84376

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Patches & Fixes for CVE-2026-84376 (2)

Vendor Advisories for CVE-2026-84376 (1)

Vendor Pages for CVE-2026-84376 (1)

IV. Related Vulnerabilities

Same product: astro
Same vendor: withastro
Same weakness: CWE-187

V. Comments for CVE-2026-84376

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