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CVE-2026-8356

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.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:d7775cfdfb65745f6399a530fd879f598c76d87a2a0c9883e96279b99cd1a6fa
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-121","description":"CWE-121 Stack-based Buffer Overflow","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:f5cd023ba4912d4aeeeb36c0fb16bdb711887162f1d13385c3e1dce8ea900bde · sha256:5ecbc0ed3d9e2ddc… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-787","description":"CWE-787 Out-of-bounds Write","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:f5cd023ba4912d4aeeeb36c0fb16bdb711887162f1d13385c3e1dce8ea900bde · sha256:5ecbc0ed3d9e2ddc… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"defaultStatus":"unknown","product":"LibreOffice","vendor":"The Document Foundation","versions":[{"lessThan":"< 26.2.4","status":"affected","version":"26.2","versionType":"26.2 series"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:f5cd023ba4912d4aeeeb36c0fb16bdb711887162f1d13385c3e1dce8ea900bde · sha256:5ecbc0ed3d9e2ddc… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"LOCAL","baseScore":5.4,"baseSeverity":"MEDIUM","exploitMaturity":"PROOF_OF_CONCEPT","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"PASSIVE","valueDensity":"NOT_DEFINED","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","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidential…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:f5cd023ba4912d4aeeeb36c0fb16bdb711887162f1d13385c3e1dce8ea900bde · sha256:5ecbc0ed3d9e2ddc… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

2 source assertions
{"cweId":"CWE-121","description":"CWE-121 Stack-based Buffer Overflow","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:f5cd023ba4912d4aeeeb36c0fb16bdb711887162f1d13385c3e1dce8ea900bde · sha256:5ecbc0ed3d9e2ddc… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-787","description":"CWE-787 Out-of-bounds Write","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:f5cd023ba4912d4aeeeb36c0fb16bdb711887162f1d13385c3e1dce8ea900bde · sha256:5ecbc0ed3d9e2ddc… · /containers/cna/problemTypes/0/descriptions/0

Source references

1 source assertion
{"url":"https://www.libreoffice.org/about-us/security/advisories/cve-2026-8356"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f5cd023ba4912d4aeeeb36c0fb16bdb711887162f1d13385c3e1dce8ea900bde · sha256:5ecbc0ed3d9e2ddc… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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