{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-8358","assignerOrgId":"4fe7d05b-1353-44cc-8b7a-1e416936dff2","state":"PUBLISHED","assignerShortName":"Document Fdn.","dateReserved":"2026-05-11T19:01:49.347Z","datePublished":"2026-06-15T16:24:03.796Z","dateUpdated":"2026-06-16T19:27:16.142Z"},"containers":{"cna":{"providerMetadata":{"orgId":"4fe7d05b-1353-44cc-8b7a-1e416936dff2","shortName":"Document Fdn.","dateUpdated":"2026-06-16T19:27:16.142Z"},"title":"Heap buffer overflow in spreadsheet tracked-changes import","datePublic":"2026-06-15T00:00:00.000Z","problemTypes":[{"descriptions":[{"lang":"en","cweId":"CWE-843","description":"CWE-843 Access of Resource Using Incompatible Type ('Type Confusion')","type":"CWE"}]},{"descriptions":[{"lang":"en","cweId":"CWE-787","description":"CWE-787 Out-of-bounds Write","type":"CWE"}]}],"impacts":[{"capecId":"CAPEC-44","descriptions":[{"lang":"en","value":"CAPEC-44 Overflow Binary Resource File"}]}],"affected":[{"vendor":"The Document Foundation","product":"LibreOffice","versions":[{"status":"affected","version":"25.8","lessThan":"< 25.8.7","versionType":"26.2 series"},{"status":"affected","version":"26.2","lessThan":"< 26.2.4","versionType":"26.2 series"}],"defaultStatus":"unknown"}],"descriptions":[{"lang":"en","value":"LibreOffice Calc can import tracked changes from a spreadsheet document. A heap buffer overflow existed when a document reused the same change identifier for two different kinds of change. The importer then treated one change object as a different, larger type and wrote past the end of its allocation. In fixed versions records with a duplicate identifier are rejected.","supportingMedia":[{"type":"text/html","base64":false,"value":"<p>LibreOffice Calc can import tracked changes from a spreadsheet document. A heap buffer overflow existed when a document reused the same change identifier for two different kinds of change. The importer then treated one change object as a different, larger type and wrote past the end of its allocation. In fixed versions records with a duplicate identifier are rejected.</p>"}]}],"references":[{"url":"https://www.libreoffice.org/about-us/security/advisories/cve-2026-8358"}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"LOCAL","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"PASSIVE","vulnConfidentialityImpact":"LOW","subConfidentialityImpact":"NONE","vulnIntegrityImpact":"LOW","subIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subAvailabilityImpact":"NONE","exploitMaturity":"PROOF_OF_CONCEPT","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED","version":"4.0","baseSeverity":"MEDIUM","baseScore":5.4,"vectorString":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/E:P"}}],"credits":[{"lang":"en","value":"Anthropic (automated discovery using Claude)","type":"finder"},{"lang":"en","value":"Arthur Chan of Ada Logics (validation and reporting)","type":"analyst"}],"source":{"discovery":"EXTERNAL"},"x_generator":{"engine":"Vulnogram 1.0.2"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-15T18:01:43.169114Z","id":"CVE-2026-8358","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-06-15T18:01:48.332Z"}}]}}