High [CVE-2026-54463] Denial of Service via unbounded memory consumption in WebSocket length header
This high-severity Red Hat Linux advisory covers CVE-2026-54463.
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Summary
websocket-driver is a WebSocket protocol handler with pluggable I/O. This can make a WebSocket connection consume an unbounded amount of memory and lead to the host process running out of memory.
This issue is fixed in version 0.8.1. A remote attacker could exploit a vulnerability in how draft versions of the WebSocket protocol handle length headers.
By sending an indefinite sequence of specially crafted bytes, an attacker can cause the affected component to consume an unbounded amount of memory. Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
Weakness: CWE-770. Red Hat lists Red Hat Hardened Images as not affected.
- < 0.8.1
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
Mitigation
Upgrade to a fixed release: 0.8.1. That is the remediation for this advisory.
The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
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