> CVE-2026-84376 [MEDIUM]

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PUBLISHED
2026-09-02 17:18
MODIFIED
2026-09-02 17:18
CVSS_SCORE V3
6.3
EPSS (Prob. Exploit)
0.71%
Top 47.1%
DATA SOURCES:
NVD đź”— 2026-09-02 CWE MITRE đź”— 2026-10-01 FIRST EPSS đź”— 2026-10-25 GITHUB đź”— 2026-10-29 OSV đź”— 2026-09-09

> 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.

> AFFECTED_PRODUCTS

ℹ️ Aucun produit affecté n'a encore été publié par NVD pour cette CVE.

> CVSS V3 METRICS

CVSS_VECTOR
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

> MÉTRIQUES CVSS DÉTAILLÉES

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Métrique Valeur Interprétation
AV (Vecteur d'Attaque)
Attack Vector
Network (N)
Exploit possible à distance via réseau (HTTP, API, etc.)
AC (Complexité d'Attaque)
Attack Complexity
Low (L)
Peu de conditions requises pour exploiter
PR (Privilèges Requis)
Privileges Required
None (N)
Aucune authentification requise
UI (Interaction Utilisateur)
User Interaction
None (N)
Aucune interaction utilisateur nécessaire
S (Périmètre)
Scope
Unchanged (U)
Impact reste dans le périmètre du composant compromis
C (Impact Confidentialité)
Confidentiality Impact
Low (L)
Divulgation limitée d'informations
I (Impact Intégrité)
Integrity Impact
Low (L)
Modification limitée des données possible
A (Impact Disponibilité)
Availability Impact
None (N)
Aucune interruption de service

> RÉSUMÉ DES IMPACTS

Confidentialité
Low
Divulgation limitée d'informations
Intégrité
Low
Modification limitée des données possible
Disponibilité
None
Aucune interruption de service

> WEAKNESSES

CWE-187

> CWE DETAILED DESCRIPTIONS

CWE-187: Partial String Comparison - The product performs a comparison that only examines a portion of a factor before determining whether there is a match, such as a substring, leading to resultant weaknesses.

> GITHUB SECURITY ADVISORY

GHSA-376h-93r7-7g6f MODERATE

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

AFFECTED PACKAGES:
NPM / astro
<= 7.2.3
Fixed in: 7.2.4

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

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

AFFECTED PACKAGES:
Unknown / Unknown
3010 versions affected
ALIASES:
GHSA-376h-93r7-7g6f

> HISTORIQUE DES MODIFICATIONS

Première apparition
02/09/2026 17:18
Source: NVD
📊 ENRICHISSEMENT 01/10/2026 06:01
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-187: Partial String Comparison - The product performs a comparison that only examines a portion of a factor before determining whether there is a match, such as a substring, leading to resultant w...
Total des modifications: 1 Dernière mise à jour: 4 weeks ago

> REFERENCES

https://github.com/withastro/astro/commit/05763a0884aabb1da78a2749d5bb9d41ae6205...
https://github.com/withastro/astro/pull/17701
https://github.com/withastro/astro/releases/tag/[email protected]
https://github.com/withastro/astro/security/advisories/GHSA-376h-93r7-7g6f
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