CVE-2026-10099 (GCVE-0-2026-10099)
Vulnerability from cvelistv5 – Published: 2026-05-29 15:58 – Updated: 2026-11-08 14:00
VLAI
EPSS
VEX
Title
XX-Net V5.16.6 WebSocket Frame Parsing Data Corruption via simple_http_server.py
Summary
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.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-01 15:24 UTC
CWE
- CWE-1286 - – Improper Validation of Syntactic Correctness of Input
Assigner
VulnCheck
CNA
References
4 references
| URL | Tags |
|---|---|
| https://github.com/XX-net/XX-Net/issues/14169 | issue-tracking |
| https://github.com/XX-net/XX-Net/pull/14170 | issue-trackingpatch |
| https://github.com/XX-net/XX-Net/commit/a68b972a8… | patch |
| https://www.vulncheck.com/advisories/xx-net-webso… | third-party-advisory |
Impacted products
Date Public
2026-05-29 15:55
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Nomenclature
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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