Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Netty's netty-codec-redis package is vulnerable in versions 4.2.0.Final before 4.2.15.Final and in versions before 4.1.135.Final. A remote peer that can send Redis protocol data to an application using the aggregator can send a small array header declaring a very large element count, which makes the handler pre-allocate a large backing array and can exhaust memory. Upgrade to 4.2.15.Final or 4.1.135.Final, depending on the release line in use.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 7.5 | High | 3.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0046, the 40th percentile, on 9 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:17 UTC First seen by agentprime
- 31 Oct 2026, 14:17 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-5w86-c3rq-vjj7
- OSV: GHSA-5w86-c3rq-vjj7
- github.com/netty/netty/security/advisories/GHSA-5w86-c3rq-vjj7
- nvd.nist.gov/vuln/detail/CVE-2026-50011
- github.com/netty/netty
- github.com/netty/netty/releases/tag/netty-4.1.135.Final
- github.com/netty/netty/releases/tag/netty-4.2.15.Final