CVE search · CVE-2026-56818
CVE-2026-56818
medium 6.5
Netty is an asynchronous, event-driven network application framework. Prior to 4.1.136.Final and 4.2.16.Final, the RedisArrayAggregator Redis codec clears retained partial aggregate state when the maxNestedArrayDepth limit is exceeded, but it does not clear the same state when the sibling maxElements limit is exceeded. A peer can start a valid RESP array, send a bulk string child, then send a nested array header longer than the configured maxElements. Netty throws a decoder exception in decodeRedisArrayHeader, but the existing partial aggregate remains retained in the handler. If the application leaves the channel alive after the exception, later messages are still consumed into the pre-error aggregate, allowing an unauthenticated peer to keep attacker-controlled aggregate state alive across a security-limit exception and pin retained pooled buffers. This issue is fixed in versions 4.1.136.Final and 4.2.16.Final.
Details
- Status
- Analyzed
- Published
- Last changed
- Source
- security-advisories@github.com
Severity
| Version | Score | Vector | Source |
|---|---|---|---|
| CVSS 3.1 | medium 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L |
security-advisories@github.comSecondary |
| CVSS 3.1 | medium 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L |
nvd@nist.govPrimary |
Affected products
Vendor and product from the NVD’s CPE applicability statements. Versions and conditions are on the NVD’s page.
- netty · netty
References
- https://github.com/netty/netty/commit/5b68c61f37aa4a3045cba624cbea239655c9003bPatch
- https://github.com/netty/netty/commit/bb2ff68a1fb71cb4b0eb9a9e17b66c52aff680c6Patch
- https://github.com/netty/netty/pull/17065Issue TrackingPatch
- https://github.com/netty/netty/security/advisories/GHSA-p9jm-q85p-7mcpExploitVendor Advisory
- https://github.com/netty/netty/security/advisories/GHSA-p9jm-q85p-7mcpExploitVendor Advisory