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Vulnerability · Published Apr 24, 2026 · Assigned by GitHub_M

CVE-2026-41476Deskflow: clipboard deserialization global-buffer-overflow

High 7.4

In plain English

A high-severity buffer overflow in deskflow from deskflow. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 28% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)7.4High
Exploit odds (30 days)0.3%top 72.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official description

Deskflow is a keyboard and mouse sharing app. Prior to 1.26.0.138, a remote memory-safety vulnerability in Deskflow's clipboard deserialization allows a connected peer to trigger an out-of-bounds read by sending a malformed clipboard update. The issue is in the implementation of src/lib/deskflow/IClipboard.cpp. This is reachable because ClipboardChunk::assemble() in src/lib/deskflow/ClipboardChunk.cpp validates only the outer clipboard transfer size. It does not validate the internal structure of the serialized clipboard blob, so malformed inner lengths reach IClipboard::unmarshall() unchanged. This vulnerability is fixed in 1.26.0.138.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:13deskflowno fix listedDEBIAN-CVE-2026-41476
Debian:14deskflow1.26.0+dfsg-2DEBIAN-CVE-2026-41476
Ubuntu:25.10deskflowno fix listedUBUNTU-CVE-2026-41476
Ubuntu:26.04:LTSdeskflowno fix listedUBUNTU-CVE-2026-41476
Ubuntu:26.10deskflowno fix listedUBUNTU-CVE-2026-41476

Affected products (as reported)

VendorProductVersions
deskflow deskflow < 1.26.0.138

Weakness: CWE-120 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P

References