Vulnerability Description
XX-Net V5.16.6 contains a WebSocket frame parsing vulnerability in the WebSocket_receive_worker routine of simple_http_server.py that allows attackers to cause corrupted application data by sending unmasked WebSocket frames. The server unconditionally reads 4 bytes as a masking key regardless of whether the MASK bit is set in the frame header, causing the first 4 bytes of payload to be consumed as a mask key and the remaining payload to be incorrectly XOR-decoded, resulting in data corruption alongside missing RSV bit, opcode, and FIN fragmentation validations.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/XX-net/XX-Net/commit/a68b972a84ed6e52df9f30237cf47493b9231b53
- https://github.com/XX-net/XX-Net/issues/14169
- https://github.com/XX-net/XX-Net/pull/14170
- https://www.vulncheck.com/advisories/xx-net-websocket-frame-parsing-data-corrupt
FAQ
What is CVE-2026-10099?
CVE-2026-10099 is a vulnerability with a CVSS score of 4.0 (MEDIUM). XX-Net V5.16.6 contains a WebSocket frame parsing vulnerability in the WebSocket_receive_worker routine of simple_http_server.py that allows attackers to cause corrupted application data by sending un...
How severe is CVE-2026-10099?
CVE-2026-10099 has been rated MEDIUM with a CVSS base score of 4.0/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-10099?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.