high7.5
CVE-2026-69210
Http4s is a Scala interface for HTTP services.
Impact
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.MAX_VALUE but permits negative 64-bit lengths. A remote client that completes a WebSocket handshake through an Ember server can send such a frame, causing the decoder to return an empty frame without advancing its input. The decode loop then runs indefinitely, pins a worker at full CPU, and grows an ArrayBuffer without bound, resulting in denial of service. This issue is fixed in versions 0.23.35 and 1.0.0-M47.
Affected products
| Product | Affected versions |
|---|---|
| Http4s Is A Scala Interface For HTTP Services. | before 0.23.35 |
Versions were read from the advisory text. No structured product data has been published for this record yet.