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CVE-2026-65976— Deskflow: Clipboard receiver can accumulate data beyond Deskflow's configured clipboard size limit

Quick assessment

Affected
deskflow deskflow
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.

Deskflow是Deskflow团队的一款开源键盘鼠标共享软件。 Deskflow 1.17.0版本至1.26.0.300之前版本存在资源管理错误漏洞，该漏洞源于对DCLP DataChunk消息验证不当，导致在DataEnd验证前追加超出声明大小和剪贴板限制的数据，从而耗尽接收方内存。

CVSS 6.5 · Medium EPSS 0.32% · P24

Possible ATT&CK Techniques 1 AI

T1110 · Brute Force

Affected Version Matrix 1

VendorProduct Version RangeStatus
deskflow deskflow >= 1.17.0, < 1.26.0.300 affected
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I. Basic Information for CVE-2026-65976

Vulnerability Information
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Vulnerability Title
Deskflow: Clipboard receiver can accumulate data beyond Deskflow's configured clipboard size limit
Source: CVE Program / CVE List V5
Vulnerability Description
Deskflow is a keyboard and mouse sharing app. From 1.17.0 until continuous build 1.26.0.300, a connected peer can send repeated DCLP DataChunk messages to ClipboardChunk::assemble() in src/lib/deskflow/ClipboardChunk.cpp, causing the server path in src/lib/server/ClientProxy1_6.cpp or client path in src/lib/client/ServerProxy.cpp to append data beyond the DataStart declared size and configured clipboard limit before DataEnd validation, exhausting receiver memory. This issue is fixed in continuous build 1.26.0.300.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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团队的一款开源键盘鼠标共享软件。 Deskflow 1.17.0版本至1.26.0.300之前版本存在资源管理错误漏洞，该漏洞源于对DCLP DataChunk消息验证不当，导致在DataEnd验证前追加超出声明大小和剪贴板限制的数据，从而耗尽接收方内存。
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 >= 1.17.0, < 1.26.0.300 -

II. Public POCs for CVE-2026-65976

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III. Intelligence Information for CVE-2026-65976

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Patches & Fixes for CVE-2026-65976 (2)

Vendor Advisories for CVE-2026-65976 (1)

Same Patch Batch · deskflow · 2026-08-17 · 3 CVEs total

CVE-2026-63409 8.2 HIGH Deskflow: Odd-length DSOP options vector causes out-of-bounds read in Deskflow client
CVE-2026-65832 8.2 HIGH Deskflow - Unauthenticated server-controlled out-of-bounds read in ServerProxy::setOptions

IV. Related Vulnerabilities

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

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