CVEvulnerability

CVE-2026-69210

7.5 HIGH Published 2026-09-15 Modified 2026-09-17 Official page ↗
Status
Deferred
Published
2026-09-15
Last modified
2026-09-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-1284, CWE-835

Description

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.

Related

Weakness · CWE (2)

  • CWE-1284 Improper Validation of Specified Quantity in Input weakness
  • CWE-835 Loop with Unreachable Exit Condition weakness

References