{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-95509", "assignerOrgId": "a59d8014-47c4-4630-ab43-e1b13cbe58e3", "state": "PUBLISHED", "assignerShortName": "Qt", "dateReserved": "2026-09-22T07:25:57.557Z", "datePublished": "2026-09-29T10:40:12.578Z", "dateUpdated": "2026-09-29T10:40:12.578Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "a59d8014-47c4-4630-ab43-e1b13cbe58e3", "shortName": "Qt", "dateUpdated": "2026-09-29T10:40:12.578Z"}, "title": "Out-of-bounds read vulnerability in string formatting impacts Qt for MCUs", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-125", "description": "CWE-125 Out-of-bounds Read", "type": "CWE"}]}, {"descriptions": [{"lang": "en", "cweId": "CWE-131", "description": "CWE-131 Incorrect Calculation of Buffer Size", "type": "CWE"}]}], "impacts": [{"capecId": "CAPEC-540", "descriptions": [{"lang": "en", "value": "CAPEC-540 Overread Buffers"}]}, {"capecId": "CAPEC-47", "descriptions": [{"lang": "en", "value": "CAPEC-47 Buffer Overflow via Parameter Expansion"}]}], "affected": [{"vendor": "qt", "product": "Qt for MCUs", "modules": ["qul"], "versions": [{"status": "affected", "version": "2.6.0", "lessThan": "2.11.3", "versionType": "python"}, {"status": "affected", "version": "2.12.0", "lessThan": "2.12.3", "versionType": "python"}], "defaultStatus": "unaffected"}], "cpeApplicability": [{"operator": "OR", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:qt:qt_for_mcus:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.0", "versionEndExcluding": "2.11.3"}, {"vulnerable": true, "criteria": "cpe:2.3:a:qt:qt_for_mcus:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.12.0", "versionEndExcluding": "2.12.3"}]}]}], "descriptions": [{"lang": "en", "value": "Strings optimized for Latin-1 displaying Latin-1 characters cause incorrect String.arg() formatting by an incorrect buffer size calculation, causing out-of-bounds reading.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>Strings optimized for Latin-1 displaying Latin-1 characters cause incorrect <code>String.arg()</code> formatting by an incorrect buffer size calculation, causing out-of-bounds reading.</p>"}]}], "references": [{"url": "https://wiki.qt.io/List_of_known_vulnerabilities_in_Qt_products#CVE-2026-95509:", "tags": ["issue-tracking"]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "LOW", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "LOW", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "HIGH", "baseScore": 8.8, "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N"}}], "source": {"discovery": "EXTERNAL"}, "x_generator": {"engine": "Claude AI (Opus 5.5) \u2014 draft only, requires human validation before submission"}}}}

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