CVE-2026-56819

A flaw was found in Netty, a network application framework. A remote, unauthenticated attacker can exploit this vulnerability by sending specially crafted HTTP/2 DATA frames to applications that use Netty and have HTTP/2 content decompression enabled. This can lead to memory exhaustion, causing t...

CVE-2026-55831

A flaw was found in Netty, a network application framework. A remote attacker, by sending a specially crafted SPDY/3.1 SETTINGS frame, could cause the SPDY SETTINGS decoder to create a large number of map entries. This excessive processing and memory allocation can lead to a denial of service DoS...

CVE-2026-56746

A flaw was found in Netty, a network application framework. A remote attacker can bypass security controls in the CorsHandler component by sending a specially crafted request with a null origin header. This bypasses the intended access restrictions, allowing unauthorized requests to reach the...

CVE-2026-56817

A flaw was found in Netty, a network application framework. A remote attacker could exploit this vulnerability by sending specially crafted XML data containing a DOCTYPE declaration to a vulnerable XmlDecoder within the Netty channel pipeline. This can lead to an XML External Entity XXE...

CVE-2026-55851

A flaw was found in Netty's codec-haproxy module. A remote attacker could exploit a vulnerability in the HAProxyMessageDecoder by sending a specially crafted PROXY protocol v2 message. This leads to unbounded buffer accumulation, causing a denial of service DoS due to memory exhaustion...

CVE-2026-56820

A flaw was found in Netty. The OcspClient component fails to validate that the Certificate ID in an Online Certificate Status Protocol OCSP response matches the requested Certificate ID. This vulnerability allows a remote attacker to bypass certificate revocation checks by presenting a legitimate...

CVE-2026-55833

A flaw was found in Netty, a network application framework. A remote attacker could exploit a vulnerability in the SPDY header decoding process. By sending a specially crafted, small compressed header block, the attacker can cause it to expand significantly during decompression, leading to...

CVE-2026-44891

A flaw was found in Netty, a network application framework, specifically within the StompSubframeDecoder component. This vulnerability allows a remote attacker to cause a denial of service DoS by sending a large number of small headers. The decoder fails to properly limit the total number or...

Uncontrolled Resource Consumption (Memory Leak)

io.netty, netty-codec-http is vulnerable to Uncontrolled Resource Consumption Memory Leak. The vulnerability is due to the SpdyHttpDecoder failing to release a pooled ByteBuf when processing specific SPDY SYNSTREAM frames that are later reset RSTSTREAM or exceed the configured maxContentLength,...

Improper Handling Of Duplicate Host Headers

io.netty, netty-codec-http2 is vulnerable to Improper Handling of Duplicate Host Headers. The vulnerability is due to the HTTP/2-to-HTTP/1.x translation layer failing to deduplicate or validate Host headers when both the :authority pseudo-header and a literal Host header are present, which allows...

XML External Entity (XXE) Injection

Netty is vulnerable to XML External Entity XXE Injection. The vulnerability is due to the XmlDecoder using an AsyncXMLInputFactory with default security settings, leaving DTD and external entity processing enabled. This allows an attacker to send specially crafted XML containing a DOCTYPE...

Denial Of Service (DoS)

Netty is vulnerable to Denial of Service DoS. The vulnerability is due to an infinite loop in the run-length encoding RLE state machine within the Bzip2Decoder handler when processing a malformed bzip2 stream, which allows an attacker to exploit the issue by sending a specially crafted bzip2 stre...

HTTP Request Smuggling

io.netty, netty-codec-http is vulnerable to HTTP Request Smuggling. The vulnerability is due to the WebSocket V07/V08 handshaker accepting a WebSocket upgrade request without requiring the Connection: Upgrade and Upgrade: websocket headers, which allows an attacker to force an unrecognized protoc...

Improper Certificate Validation

io.netty, netty-handler-ssl-ocsp is vulnerable to Improper Certificate Validation. The vulnerability is due to OcspClient failing to validate that the CertificateID in an OCSP response matches the requested CertificateID, which allows an attacker to replay a legitimately signed GOOD OCSP response...

Linux Distros Unpatched Vulnerability : CVE-2026-56820

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Netty is a network application framework for development of protocol servers and clients. In versions 4.2.0.Final through 4.2.15.Final and prior to 4.1.135.Fina...

Linux Distros Unpatched Vulnerability : CVE-2026-56816

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Netty is a network application framework for development of protocol servers and clients. Prior to 4.2.16.Final, Netty's Http3FrameCodec buffers incoming data f...

Linux Distros Unpatched Vulnerability : CVE-2026-55833

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Netty is a network application framework for development of protocol servers and clients. Prior to 4.1.136.Final and 4.2.16.Final, Netty SPDY header decoding...

Linux Distros Unpatched Vulnerability : CVE-2026-56817

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Netty is a network application framework for development of protocol servers and clients. In versions 4.2.0.Final through 4.2.15.Final and 4.1.0.Final through...

Linux Distros Unpatched Vulnerability : CVE-2026-55851

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Netty is a network application framework for development of protocol servers and clients. In versions 4.2.0.Final up to but not including 4.2.16.Final, and...

Linux Distros Unpatched Vulnerability : CVE-2026-56746

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Netty is a network application framework for development of protocol servers and clients. Versions 4.2.0.Final through 4.2.15.Final and 4.1.0.Final through...