{"id":"CVE-2026-8356","state":"PUBLISHED","title":"Stack buffer overflow in PPT presentation import","description":"LibreOffice can import presentations in the legacy binary PPT format. A stack buffer overflow existed when importing a colour-replacement record. Two fixed-size colour tables were filled from the file, but the write position was not reset between the two passes over the record, so a file whose combined colour counts exceeded the table size wrote past the end of the tables on the stack. In fixed versions the unused second pass is no longer read into those tables.","publishedAt":"2026-06-15T16:23:06.477Z","updatedAt":"2026-06-15T18:05:22.786Z","severity":{"score":5.4,"label":"Medium","version":"4.0","vector":"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","source":"Document Fdn."},"assigner":"Document Fdn.","products":["The Document Foundation LibreOffice"],"affected":[{"vendor":"The Document Foundation","product":"LibreOffice","defaultStatus":"unknown","versions":[{"version":"26.2","status":"affected","lessThan":"< 26.2.4","versionType":"26.2 series"}]}],"references":["https://www.libreoffice.org/about-us/security/advisories/cve-2026-8356"],"weaknesses":["CWE-787","CWE-121"],"ingestedAt":"2026-10-29T20:13:26.108Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/8xxx/CVE-2026-8356.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-8356","state":"PUBLISHED","datePublished":"2026-06-15T16:23:06.477Z","dateUpdated":"2026-06-15T18:05:22.786Z","assignerShortName":"Document Fdn.","assignerOrgId":"4fe7d05b-1353-44cc-8b7a-1e416936dff2","dateReserved":"2026-05-11T18:42:20.783Z"},"containers":{"cna":{"title":"Stack buffer overflow in PPT presentation import","descriptions":[{"lang":"en","value":"LibreOffice can import presentations in the legacy binary PPT format. A stack buffer overflow existed when importing a colour-replacement record. Two fixed-size colour tables were filled from the file, but the write position was not reset between the two passes over the record, so a file whose combined colour counts exceeded the table size wrote past the end of the tables on the stack. In fixed versions the unused second pass is no longer read into those tables."}],"affected":[{"vendor":"The Document Foundation","product":"LibreOffice","defaultStatus":"unknown","versions":[{"version":"26.2","status":"affected","lessThan":"< 26.2.4","versionType":"26.2 series"}]}],"references":[{"url":"https://www.libreoffice.org/about-us/security/advisories/cve-2026-8356"}],"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"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-787","lang":"en","description":"CWE-787 Out-of-bounds Write","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-121","lang":"en","description":"CWE-121 Stack-based Buffer Overflow","type":"CWE"}]}],"providerMetadata":{"shortName":"Document Fdn.","orgId":"4fe7d05b-1353-44cc-8b7a-1e416936dff2","dateUpdated":"2026-06-15T16:23:06.477Z"},"datePublic":"2026-06-15T00:00:00.000Z","impacts":[{"capecId":"CAPEC-44","descriptions":[{"lang":"en","value":"CAPEC-44 Overflow Binary Resource File"}]}],"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":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-15T18:04:56.736672Z","id":"CVE-2026-8356","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-06-15T18:05:22.786Z"}}]}}}