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

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-44296— Deskflow: TLS multiplexer DoS on failed `SSL_accept`

Quick assessment

Affected
deskflow deskflow
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

deskflow是Deskflow开源的一款跨设备键盘鼠标共享工具。 Deskflow 1.26.0.167之前版本存在资源管理错误漏洞，该漏洞源于TLS握手失败时SecureSocket::secureAccept进入致命错误分支并阻塞多路复用器工作线程，可能导致拒绝服务。

CVSS 7.5 · High EPSS 0.28% · P20

Affected Version Matrix 1

VendorProduct Version RangeStatus
deskflow deskflow < 1.26.0.167 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-44296

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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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
Deskflow: TLS multiplexer DoS on failed `SSL_accept`
Source: CVE Program / CVE List V5
Vulnerability Description
Deskflow is a keyboard and mouse sharing app. Prior to 1.26.0.167, a remote, unauthenticated denial of service (DoS) vulnerability affects Deskflow servers running with TLS enabled (the default). When any TCP peer connects to the listening port and its first bytes do not parse as a valid TLS ClientHello, SecureSocket::secureAccept enters its fatal-error branch and calls Arch::sleep(1) (a blocking 1-second sleep) on the multiplexer worker thread. That thread services every socket on the server, including established TLS clients delivering mouse motion, keyboard events, and clipboard updates. A single failed handshake therefore stalls input delivery to all connected screens for ~1 second, and a sustained drip of malformed connections (≥ 1/s) makes the server effectively unusable while the attack persists. This vulnerability is fixed in 1.26.0.167.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
deskflow 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
deskflow是Deskflow开源的一款跨设备键盘鼠标共享工具。 Deskflow 1.26.0.167之前版本存在资源管理错误漏洞，该漏洞源于TLS握手失败时SecureSocket::secureAccept进入致命错误分支并阻塞多路复用器工作线程，可能导致拒绝服务。
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
deskflow deskflow < 1.26.0.167 -

II. Public POCs for CVE-2026-44296

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 7608 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-44296

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-44296 (1)

Vendor Advisories for CVE-2026-44296 (1)

IV. Related Vulnerabilities

Same product: deskflow
Same vendor: deskflow
Same weakness: CWE-400

V. Comments for CVE-2026-44296

No comments yet

Leave a comment