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CVE-2026-59903

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

Description (CNA)

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 (CNA)

Vendor / productVersions
netty / nettyaffected < 4.1.137.Final; affected >= 4.2.0.Final, < 4.2.17.Final

CWE

CWE-524

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.