CVE-2026-59903
Netty: Cache Poisoning and Information Disclosure via CORS Vary Header Overwrite
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.
No summary for this CVE yet.
CVSS Vector Breakdown
Exploitability
AV:NAttack VectorNetwork
AC:HAttack ComplexityHigh
PR:NPrivileges RequiredNone
UI:NUser InteractionNone
Scope
S:UScopeUnchanged
Impact
C:HConfidentialityHigh
I:LIntegrityLow
A:NAvailabilityNone
Weaknesses
Affected Products
netty
oss-projectaka netty-incubator-codec-ohttp, io.netty:netty
Exploitability
Official Patch Available
References
https://github.com/netty/netty/pull/17213
github.com
https://github.com/netty/netty/pull/17217
github.com
https://github.com/netty/netty/releases/tag/netty-4.1.137.Final
github.com
and 2 more references View all →
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