CVE-2026-59903: Netty Vulnerable to Cache Poisoning and Information Disclosure via CORS Vary Header Overwrite
Netty’s CorsHandler silently overwrites existing Vary headers, enabling cache poisoning and sensitive information disclosure.
References
- github.com/advisories/GHSA-8c42-7qj2-3j46
- github.com/netty/netty/pull/17213
- github.com/netty/netty/pull/17217
- github.com/netty/netty/releases/tag/netty-4.1.137.Final
- github.com/netty/netty/releases/tag/netty-4.2.17.Final
- github.com/netty/netty/security/advisories/GHSA-8c42-7qj2-3j46
- nvd.nist.gov/vuln/detail/CVE-2026-59903
Code Behaviors & Features
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