CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HCVE-2026-50011
High (7.5) in netty netty. EPSS 0.5% chance of exploitation in the next 30 days. Fixed in io.netty:netty-codec-redis 4.1.135.Final, 4.2.15.Final.
Netty is a network application framework for development of protocol servers and clients. Prior to versions 4.1.135.Final and 4.2.15.Final, RedisArrayAggregator pre-allocates ArrayList with initial capacity equal to the RESP array element count declared in an array header. That count is taken from the wire before the corresponding child messages exist. A small malicious header can claim a huge initial capacity. Versions 4.1.135.Final and 4.2.15.Final patch the issue.
Severity
- EPSS
- 0.5% chance of exploitation in the next 30 days; higher than 39% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-400, CWE-770
- Published
- Modified
- Record from
- the NVD, synced
Affected
- netty:netty
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-5w86-c3rq-vjj7 | Maven | io.netty:netty-codec-redis | >=4.2.0.Final <4.2.15.Final | 4.2.15.Final |
| GHSA-5w86-c3rq-vjj7 | Maven | io.netty:netty-codec-redis | <4.1.135.Final | 4.1.135.Final |