CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NCVE-2026-59903
High (7.5) in netty netty. EPSS 0.3% chance of exploitation in the next 30 days. Fixed in io.netty:netty-codec-http 4.1.137.Final, 4.2.17.Final.
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.
Severity
- EPSS
- 0.3% chance of exploitation in the next 30 days; higher than 25% of CVEs (scores of 2026-10-31)
- CWE
- CWE-524
- Published
- Modified
- Record from
- the NVD, synced
Affected
- netty:netty
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-8c42-7qj2-3j46 | Maven | io.netty:netty-codec-http | >=4.2.0.Final <4.2.17.Final | 4.2.17.Final |
| GHSA-8c42-7qj2-3j46 | Maven | io.netty:netty-codec-http | <4.1.137.Final | 4.1.137.Final |