> CVE-2026-49859 [MEDIUM]

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PUBLISHED
2026-06-23 18:18
MODIFIED
2026-06-23 19:34
CVSS_SCORE V3
5.2
EPSS (Prob. Exploit)
0.14%
Top 96.9%
DATA SOURCES:
NVD 🔗 2026-06-23 CWE MITRE 🔗 2026-11-01 FIRST EPSS 🔗 2026-10-25 GITHUB 🔗 2026-10-29

> DESCRIPTION

Deno is a JavaScript, TypeScript, and WebAssembly runtime. Prior to 2.8.1, when fetch() was called, Deno checked the destination hostname against --deny-net rules but did not re-check the IP addresses that hostname resolved to. An attacker-controlled script could use a specially crafted domain name that passes the hostname check yet resolves to a denied IP, bypassing the network restriction entirely. This vulnerability is fixed in 2.8.1.

> AFFECTED_PRODUCTS

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

> CVSS V3 METRICS

CVSS_VECTOR
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
EXPLOITABILITY
2.0
IMPACT
2.7

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Métrique Valeur Interprétation
AV (Vecteur d'Attaque)
Attack Vector
Local (L)
Exploit nécessite un accès local au système
AC (Complexité d'Attaque)
Attack Complexity
Low (L)
Peu de conditions requises pour exploiter
PR (Privilèges Requis)
Privileges Required
Low (L)
Authentifié avec compte utilisateur basique
UI (Interaction Utilisateur)
User Interaction
None (N)
Aucune interaction utilisateur nécessaire
S (Périmètre)
Scope
Changed (C)
Impact s'étend au-delà 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-693 CWE-918

> CWE DETAILED DESCRIPTIONS

CWE-693: Protection Mechanism Failure - The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product. | CWE-918: Server-Side Request Forgery - The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.

> GITHUB SECURITY ADVISORY

GHSA-cpgj-f7g3-2pp2 MODERATE

Deno: `fetch()` API sandbox bypass via missing DNS resolution check

AFFECTED PACKAGES:
RUST / deno
<= 2.8.0
Fixed in: 2.8.1

> HISTORIQUE DES MODIFICATIONS

Première apparition
23/06/2026 18:18
Source: NVD
📊 ENRICHISSEMENT 01/11/2026 06:59
CWE
Champ modifié: Description CWE
Ancienne valeur:
CWE-693: Protection Mechanism Failure - The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product. | CWE-918: Se...
Nouvelle valeur:
CWE-693: Protection Mechanism Failure - The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product. | CWE-918: Se...
📊 ENRICHISSEMENT 01/07/2026 06:01
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-693: Protection Mechanism Failure - The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product. | CWE-918: Se...
Total des modifications: 2 Dernière mise à jour: 5 days ago

> REFERENCES

https://github.com/denoland/deno/security/advisories/GHSA-cpgj-f7g3-2pp2
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