{"id":"CVE-2026-63409","state":"PUBLISHED","title":"Deskflow: Odd-length DSOP options vector causes out-of-bounds read in Deskflow client","description":"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.","publishedAt":"2026-08-17T20:57:19.326Z","updatedAt":"2026-08-18T15:18:00.706Z","severity":{"score":8.2,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["deskflow deskflow"],"affected":[{"vendor":"deskflow","product":"deskflow","versions":[{"version":">= 1.17.0, < 1.26.0.296","status":"affected"}]}],"references":["https://github.com/deskflow/deskflow/security/advisories/GHSA-gmvh-3c73-m5gg","https://github.com/deskflow/deskflow/commit/8266fbbe6af93fa370018886c7f1f35d2cee8b3f"],"weaknesses":["CWE-125"],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/63xxx/CVE-2026-63409.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-63409","state":"PUBLISHED","datePublished":"2026-08-17T20:57:19.326Z","dateUpdated":"2026-08-18T15:18:00.706Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-07-16T19:20:28.987Z"},"containers":{"cna":{"title":"Deskflow: Odd-length DSOP options vector causes out-of-bounds read in Deskflow client","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"deskflow","product":"deskflow","versions":[{"version":">= 1.17.0, < 1.26.0.296","status":"affected"}]}],"references":[{"url":"https://github.com/deskflow/deskflow/security/advisories/GHSA-gmvh-3c73-m5gg","name":"https://github.com/deskflow/deskflow/security/advisories/GHSA-gmvh-3c73-m5gg","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/deskflow/deskflow/commit/8266fbbe6af93fa370018886c7f1f35d2cee8b3f","name":"https://github.com/deskflow/deskflow/commit/8266fbbe6af93fa370018886c7f1f35d2cee8b3f","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.2,"baseSeverity":"HIGH","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-125","lang":"en","description":"CWE-125: Out-of-bounds Read","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-08-17T20:57:19.326Z"},"source":{"advisory":"GHSA-gmvh-3c73-m5gg","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/deskflow/deskflow/security/advisories/GHSA-gmvh-3c73-m5gg","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-18T15:17:36.309685Z","id":"CVE-2026-63409","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-18T15:18:00.706Z"}}]}}}