{"id":"CVE-2026-103653","title":"Out-of-bounds read vulnerability in CoAP message parsing impacts Qt CoAP","summary":"An out-of-bounds read vulnerability in the Qt CoAP message parsing (QCoapInternalReply::createFromFrame()) of the Qt CoAP module. Processing a malformed CoAP message can cause an application using Qt CoAP to crash (loss of availability) …","severity":"medium","cvss":6.7,"cvssVector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:U/AU:Y/R:U/RE:L/U:Amber","cvssSource":"cna","cwe":["CWE-125"],"vendor":"qt","product":"Qt","affected":["Qt >= 5.13.0 <= 6.8.8","Qt >= 6.9.0 <= 6.11.2"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-11-03T20:06:32.421773Z"},"published":"2026-11-03","updated":"2026-11-03","sourceUpdated":"2026-11-03T20:06:47.825Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-103653","references":[{"url":"https://wiki.qt.io/List_of_known_vulnerabilities_in_Qt_products#CVE-2026-103653:"},{"url":"https://codereview.qt-project.org/c/qt/qtcoap/+/760652"},{"url":"https://codereview.qt-project.org/c/qt/qtcoap/+/761120"}],"tags":["cve.org"],"epss":0.00291,"epssPercentile":0.21847,"ingestedAt":"2026-11-05T20:33:06.430Z","slug":"CVE-2026-103653","body":"## Overview\n\nAn out-of-bounds read vulnerability in the Qt CoAP message parsing (QCoapInternalReply::createFromFrame()) of the Qt CoAP module. Processing a malformed CoAP message can cause an application using Qt CoAP to crash (loss of availability) or to continue operating on incorrect data (potential loss of integrity).\n\n## Affected\n\n- `Qt >= 5.13.0 <= 6.8.8`\n- `Qt >= 6.9.0 <= 6.11.2`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":37,"depthScoreParts":{"impact":36.9,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}