Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-10099— XX-Net V5.16.6 WebSocket Frame Parsing Data Corruption via simple_http_server.py

Quick assessment

Affected
XX-net XX-Net
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

XX-Net是XX-Net开源的一款网络隐身翻墙工具。 XX-Net 5.16.6版本存在安全漏洞，该漏洞源于simple_http_server.py中WebSocket_receive_worker例程存在WebSocket帧解析问题，可能导致应用程序数据损坏。

CVSS 4.0 · Medium EPSS 0.12% · P2

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 2

VendorProduct Version RangeStatus
XX-net XX-Net ≤ 5.16.6 affected
≤ 43aec6f affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-10099

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
XX-Net V5.16.6 WebSocket Frame Parsing Data Corruption via simple_http_server.py
Source: CVE Program / CVE List V5
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1286
Source: CVE Program / CVE List V5
Vulnerability Title
XX-Net 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
XX-Net是XX-Net开源的一款网络隐身翻墙工具。 XX-Net 5.16.6版本存在安全漏洞，该漏洞源于simple_http_server.py中WebSocket_receive_worker例程存在WebSocket帧解析问题，可能导致应用程序数据损坏。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
XX-net XX-Net 0 ~ 5.16.6 -

II. Public POCs for CVE-2026-10099

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-10099

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-10099 (2)

Vendor Advisories for CVE-2026-10099 (2)

IV. Related Vulnerabilities

Same weakness: CWE-1286