Netty: [HttpContentEncoder] Unbounded Per-Connection Queue Growth via HTTP/1.1 Pipelining Leads to Denial of Service

CAO 7.5CVE-2026-59899 · GHSA-q4f6-jm68-57ww · Công bố 29/07/2026 · cập nhật 06/08/2026

Tóm tắt nhanh

CVE-2026-59899 là lỗ hổng mức CAO (CVSS 7.5) ảnh hưởng io.netty:netty-codec-http, netty (netty).
Xác suất bị khai thác trong 30 ngày tới (EPSS): 0.61%, cao hơn 49.2% các lỗ hổng khác.
Cách xử lý: cập nhật lên 4.2.16.Final, 4.1.136.Final, 4.2.16, 4.1.136 hoặc mới hơn.

Gói / sản phẩm	Phiên bản bị ảnh hưởng	Phiên bản đã vá
io.netty:netty-codec-http Maven	`≥ 4.2.0.Final, < 4.2.16.Final< 4.1.136.Final`	`4.2.16.Final4.1.136.Final`
netty netty	`≥ 4.2.0, < 4.2.16< 4.1.136`	`4.2.164.1.136`

Mô tả

Impact

HttpContentEncoder (the superclass of the production handler HttpContentCompressor) maintains a per-channel ArrayDeque<CharSequence> named acceptEncodingQueue that accumulates attacker-controlled data without any size limit. The queue is filled on the I/O thread for every inbound HTTP request and drained only when the application later writes a non-1xx response. This creates a resource exhaustion vulnerability when an attacker exploits HTTP/1.1 pipelining to flood the connection with requests faster than the application produces responses.

Mô tả của NVD

Netty is an asynchronous, event-driven network application framework. Prior to versions 4.1.136.Final and 4.2.16.Final, `HttpContentEncoder` (the superclass of the production handler `HttpContentCompressor`) maintains a per-channel `ArrayDeque<CharSequence>` named `acceptEncodingQueue` that accumulates attacker-controlled data without any size limit. The queue is filled on the I/O thread for every inbound HTTP request and drained only when the application later writes a non-1xx response. This creates a resource exhaustion vulnerability when an attacker exploits HTTP/1.1 pipelining to flood the connection with requests faster than the application produces responses. This issue has been fixed in versions 4.1.136.Final and 4.2.16.Final.