7.5

CVE-2026-59903

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

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Netty ≫ Netty Version < 4.1.137
Netty ≫ Netty Version >= 4.2.0 < 4.2.17
VulnDex Vulnerability Enrichment
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EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.4% 0.327
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
NIST 7.5 3.9 3.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
security-advisories@github.com 6.5 2.2 4.2
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N
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.

https://github.com/netty/netty/pull/17213
Patch
Issue Tracking
https://github.com/netty/netty/pull/17217
Patch
Issue Tracking
https://github.com/netty/netty/releases/tag/netty-4.1.137.Final
Release Notes
https://github.com/netty/netty/releases/tag/netty-4.2.17.Final
Release Notes
https://github.com/netty/netty/security/advisories/GHSA-8c42-7qj2-3j46
Vendor Advisory