CVE-2026-10099
XX-Net V5.16.6 WebSocket Frame Parsing Data Corruption via simple_http_server.py
- State
- Published
- Severity
- 5.1 Medium
- Published
- May 29, 2026
- Updated
- Jun 23, 2026
- Reserved
- May 29, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.1 Medium | CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 4.0 Medium | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N | VulnCheck |
Weaknesses
- CWE-1286 – Improper Validation of Syntactic Correctness of Input
Affected Products
| Product | Versions |
|---|---|
XX-NetXX-net |
|
References
- https://github.com/XX-net/XX-Net/issues/14169issue-tracking
- https://github.com/XX-net/XX-Net/pull/14170issue-tracking
- https://github.com/XX-net/XX-Net/commit/a68b972a84ed6e52df9f30237cf47493b9231b53patch
- https://www.vulncheck.com/advisories/xx-net-websocket-frame-parsing-data-corruption-via-simple-http-server-pythird-party-advisory
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