CVE-2026-69210 Http4s: WebSocket decoder accepts negative length, causing infinite decode loop

Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, WebSocket FrameTranscoder.bodyLength rejects extended payload lengths above Integer.MAXVALUE but permits negative 64-bit lengths. A remote client that completes a WebSocket handshake through an Ember server can send su...

CVE-2026-69210

Http4s , a Scala HTTP service library, is vulnerable to a denial of service via its WebSocket decoder. In versions prior to 0.23.35 and 1.0.0-M47 , FrameTranscoder.bodyLength rejects extended payload lengths above Integer.MAX_VALUE but incorrectly permits negative 64-bit lengths . A remote client...

CVE-2026-69210 Http4s: WebSocket decoder accepts negative length, causing infinite decode loop

Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, WebSocket FrameTranscoder.bodyLength rejects extended payload lengths above Integer.MAXVALUE but permits negative 64-bit lengths. A remote client that completes a WebSocket handshake through an Ember server can send su...

CVE-2026-69209

Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, The shared WebSocket decoder permits unbounded message buffering because defragmentation accumulates fragments without a limit and FrameTranscoder accepts declared lengths up to Int.MaxValue. A remote client that...

CVE-2026-69209

Http4s , a Scala library for HTTP services, contains an unbounded memory buffering flaw in its shared WebSocket decoder . Defragmentation accumulates fragments without a size limit, and FrameTranscoder accepts declared lengths up to Int.MaxValue. A remote client that completes a WebSocket handsha...

CVE-2026-69209 Http4s: WebSocket decoder accepts unbounded message sizes

Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, The shared WebSocket decoder permits unbounded message buffering because defragmentation accumulates fragments without a limit and FrameTranscoder accepts declared lengths up to Int.MaxValue. A remote client that...

CVE-2026-69209 Http4s: WebSocket decoder accepts unbounded message sizes

Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, The shared WebSocket decoder permits unbounded message buffering because defragmentation accumulates fragments without a limit and FrameTranscoder accepts declared lengths up to Int.MaxValue. A remote client that...

The vulnerability of the QEMU hardware emulation software, which allows a hacker to trigger a service failure

The vulnerability of the VNC websocket frame decoder in the hardware emulation software QEMU is related to resource management errors. Exploiting this vulnerability allows a malicious actor to cause service failures such as increased memory and computational resources usage by sending HTTP header...

CVE-2015-1779

The VNC websocket frame decoder in QEMU allows remote attackers to cause a denial of service memory and CPU consumption via a large 1 websocket payload or 2 HTTP headers section...

CVE-2015-1779

The VNC websocket frame decoder in QEMU allows remote attackers to cause a denial of service memory and CPU consumption via a large 1 websocket payload or 2 HTTP headers section...

netty: DoS via memory exhaustion during data aggregation

A flaw was found in the WebSocket08FrameDecoder implementation that could allow a remote attacker to trigger an Out Of Memory Exception by issuing a series of TextWebSocketFrame and ContinuationWebSocketFrames. Depending on the server configuration, this could lead to a denial of service...

netty: DoS via memory exhaustion during data aggregation

A flaw was found in the WebSocket08FrameDecoder implementation that could allow a remote attacker to trigger an Out Of Memory Exception by issuing a series of TextWebSocketFrame and ContinuationWebSocketFrames. Depending on the server configuration, this could lead to a denial of service...

netty: DoS via memory exhaustion during data aggregation

A flaw was found in the WebSocket08FrameDecoder implementation that could allow a remote attacker to trigger an Out Of Memory Exception by issuing a series of TextWebSocketFrame and ContinuationWebSocketFrames. Depending on the server configuration, this could lead to a denial of service...

PT-2014-3528 · Netty · Netty

Name of the Vulnerable Software and Affected Versions: Netty versions 3.6.x through 3.6.8 Netty versions 3.7.x through 3.7.0 Netty versions 3.8.x through 3.8.1 Netty versions 3.9.x through 3.9.0 Netty versions 4.0.x through 4.0.18 Description: The issue allows remote attackers to cause a denial o...