{"id":"CVE-2026-107590","state":"PUBLISHED","title":"Out-of-bounds write vulnerability in QTextCodec iconv-based encoding impacts Qt","description":"An out-of-bounds write vulnerability in the Qt QTextCodec iconv-based encoding of the Qt 5 Compatibility APIs module (Qt Core in Qt 5 and earlier) impacts Qt. Under certain conditions, encoding text with QTextCodec may write outside an internal buffer. This can cause the application to crash and may affect data integrity.","publishedAt":"2026-10-27T12:24:53.005Z","updatedAt":"2026-10-27T12:24:53.005Z","severity":{"score":1.9,"label":"Low","version":"4.0","vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:U/R:U/RE:L/U:Green","source":"Qt"},"assigner":"Qt","products":["qt Qt"],"affected":[{"vendor":"qt","product":"Qt","defaultStatus":"unaffected","versions":[{"version":"0","status":"unaffected","lessThan":"4.5.0","versionType":"python"},{"version":"4.5.0","status":"affected","lessThanOrEqual":"6.8.8","versionType":"python"},{"version":"6.9.0","status":"affected","lessThanOrEqual":"6.11.2","versionType":"python"}],"modules":["qt5compat","qtbase"],"cpes":["cpe:2.3:a:qt:qt:*:*:*:*:*:*:*:*","cpe:2.3:a:qt:qt5compat:*:*:*:*:*:*:*:*","cpe:2.3:a:qt:qtbase:*:*:*:*:*:*:*:*"]}],"references":["https://wiki.qt.io/List_of_known_vulnerabilities_in_Qt_products#CVE-2026-107590:","https://codereview.qt-project.org/c/qt/qt5compat/+/762752"],"weaknesses":["CWE-787","CWE-131"],"ingestedAt":"2026-10-29T20:10:23.711Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/107xxx/CVE-2026-107590.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-107590","state":"PUBLISHED","datePublished":"2026-10-27T12:24:53.005Z","dateUpdated":"2026-10-27T12:24:53.005Z","assignerShortName":"Qt","assignerOrgId":"a59d8014-47c4-4630-ab43-e1b13cbe58e3","dateReserved":"2026-10-08T11:44:23.794Z"},"containers":{"cna":{"title":"Out-of-bounds write vulnerability in QTextCodec iconv-based encoding impacts Qt","descriptions":[{"lang":"en","value":"An out-of-bounds write vulnerability in the Qt QTextCodec iconv-based encoding of the Qt 5 Compatibility APIs module (Qt Core in Qt 5 and earlier) impacts Qt. Under certain conditions, encoding text with QTextCodec may write outside an internal buffer. This can cause the application to crash and may affect data integrity."}],"affected":[{"vendor":"qt","product":"Qt","defaultStatus":"unaffected","versions":[{"version":"0","status":"unaffected","lessThan":"4.5.0","versionType":"python"},{"version":"4.5.0","status":"affected","lessThanOrEqual":"6.8.8","versionType":"python"},{"version":"6.9.0","status":"affected","lessThanOrEqual":"6.11.2","versionType":"python"}],"modules":["qt5compat","qtbase"],"cpes":["cpe:2.3:a:qt:qt:*:*:*:*:*:*:*:*","cpe:2.3:a:qt:qt5compat:*:*:*:*:*:*:*:*","cpe:2.3:a:qt:qtbase:*:*:*:*:*:*:*:*"]}],"references":[{"url":"https://wiki.qt.io/List_of_known_vulnerabilities_in_Qt_products#CVE-2026-107590:","tags":["vendor-advisory"]},{"url":"https://codereview.qt-project.org/c/qt/qt5compat/+/762752","tags":["patch"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"LOCAL","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"PASSIVE","vulnConfidentialityImpact":"NONE","subConfidentialityImpact":"NONE","vulnIntegrityImpact":"LOW","subIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subAvailabilityImpact":"NONE","exploitMaturity":"UNREPORTED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"USER","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"LOW","providerUrgency":"GREEN","version":"4.0","baseSeverity":"LOW","baseScore":1.9,"vectorString":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:U/R:U/RE:L/U:Green"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-787","lang":"en","description":"CWE-787 Out-of-bounds Write","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-131","lang":"en","description":"CWE-131 Incorrect Calculation of Buffer Size","type":"CWE"}]}],"providerMetadata":{"shortName":"Qt","orgId":"a59d8014-47c4-4630-ab43-e1b13cbe58e3","dateUpdated":"2026-10-27T12:24:53.005Z"},"impacts":[{"capecId":"CAPEC-100","descriptions":[{"lang":"en","value":"CAPEC-100 Overflow Buffers"}]}],"cpeApplicability":[{"operator":"OR","nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":false,"criteria":"cpe:2.3:a:qt:qt:*:*:*:*:*:*:*:*","versionStartIncluding":"0","versionEndExcluding":"4.5.0"},{"vulnerable":true,"criteria":"cpe:2.3:a:qt:qt:*:*:*:*:*:*:*:*","versionStartIncluding":"4.5.0","versionEndIncluding":"6.8.8"},{"vulnerable":true,"criteria":"cpe:2.3:a:qt:qt:*:*:*:*:*:*:*:*","versionStartIncluding":"6.9.0","versionEndIncluding":"6.11.2"}]}]}],"source":{"discovery":"INTERNAL"},"x_generator":{"engine":"Vulnogram 0.2.0"}}}}}