CVE-2026-63409 (GCVE-0-2026-63409)

Vulnerability from cvelistv5 – Published: 2026-08-17 20:57 – Updated: 2026-08-18 15:18
VLAI
Title
Deskflow: Odd-length DSOP options vector causes out-of-bounds read in Deskflow client
Summary
Deskflow is a keyboard and mouse sharing app. From 1.17.0 until continuous build 1.26.0.296, a malicious Deskflow server can send an odd-length DSOP vector to ServerProxy::setOptions() in src/lib/client/ServerProxy.cpp, causing the missing value after the final option key to be read beyond the vector during the PacketStreamFilter::filterEvent to ServerProxy::handleData() to ServerProxy::parseHandshakeMessage() call chain and crash the connected client. This issue is fixed in continuous build 1.26.0.296.
Severity
8.2 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-18 15:17 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
deskflow deskflow Affected: >= 1.17.0, < 1.26.0.296
guessed Create a notification for this product.
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Nomenclature

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