> CVE-2026-59903 [MEDIUM]

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PUBLISHED
2026-08-17 18:17
MODIFIED
2026-08-17 18:17
CVSS_SCORE V3
6.5
EPSS (Prob. Exploit)
0.25%
Top 85.0%
DATA SOURCES:
NVD đź”— 2026-08-17 CWE MITRE đź”— 2026-09-01 FIRST EPSS đź”— 2026-10-25 GITHUB đź”— 2026-10-29 OSV đź”— 2026-08-23

> DESCRIPTION

Netty is an asynchronous, event-driven network application framework. Prior to 4.1.137.Final and 4.2.17.Final, io.netty.handler.codec.http.cors.CorsHandler setVaryHeader replaces application Vary headers such as Authorization or Cookie with Origin, allowing a caching proxy or CDN to reuse authenticated responses across users and disclose sensitive information. This issue is fixed in versions 4.1.137.Final and 4.2.17.Final.

> 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:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N
EXPLOITABILITY
2.2
IMPACT
4.2

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N
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
High (H)
Conditions spécifiques doivent être réunies 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
High (H)
Divulgation totale 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
High
Divulgation totale d'informations
Intégrité
Low
Modification limitée des données possible
Disponibilité
None
Aucune interruption de service

> WEAKNESSES

CWE-524

> CWE DETAILED DESCRIPTIONS

CWE-524: Use of Cache Containing Sensitive Information - The code uses a cache that contains sensitive information, but the cache can be read by an actor outside of the intended control sphere.

> RED HAT SECURITY ADVISORIES

Red Hat Security Advisory: Red Hat JBoss Enterprise Application Platform 8.1.9 security update
A security update is now available for Red Hat JBoss Enterprise Application Platform 8.1 for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of I...
Red Hat Security Advisory: Red Hat JBoss Enterprise Application Platform 8.1.9 security update
An update is now available for Red Hat JBoss Enterprise Application Platform 8.1 for Red Hat Enterprise Linux 8.
Red Hat Security Advisory: Red Hat JBoss Enterprise Application Platform 8.1.9 security update
A security update is now available for Red Hat JBoss Enterprise Application Platform 8.1 for Red Hat Enterprise Linux 10. Red Hat Product Security has rated this update as having a security impact of...

> GITHUB SECURITY ADVISORY

GHSA-8c42-7qj2-3j46 MODERATE

Netty Vulnerable to Cache Poisoning and Information Disclosure via CORS Vary Header Overwrite

AFFECTED PACKAGES:
MAVEN / io.netty:netty-codec-http
<= 4.1.136.Final
Fixed in: 4.1.137.Final
MAVEN / io.netty:netty-codec-http
>= 4.2.0.Final, <= 4.2.16.Final
Fixed in: 4.2.17.Final

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

Netty: Cache Poisoning and Information Disclosure via CORS Vary Header Overwrite

AFFECTED PACKAGES:
Unknown / Unknown
204 versions affected
ALIASES:
GHSA-8c42-7qj2-3j46

> HISTORIQUE DES MODIFICATIONS

Première apparition
17/08/2026 18:17
Source: NVD
đź“Š ENRICHISSEMENT 01/09/2026 06:02
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-524: Use of Cache Containing Sensitive Information - The code uses a cache that contains sensitive information, but the cache can be read by an actor outside of the intended control sphere.
Total des modifications: 1 Dernière mise à jour: 1 month ago

> REFERENCES

https://github.com/netty/netty/pull/17213
https://github.com/netty/netty/pull/17217
https://github.com/netty/netty/releases/tag/netty-4.1.137.Final
https://github.com/netty/netty/releases/tag/netty-4.2.17.Final
https://github.com/netty/netty/security/advisories/GHSA-8c42-7qj2-3j46
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