CVE-2026-6047
CVE-2026-6047 is a medium-severity vulnerability with a CVSS 4.0 base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.
Key facts
- Severity: Medium (CVSS 4.0 base score 5.4)
- EPSS exploit prediction: 0% (2nd percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-36737
- Weakness: CWE-787
- Published:
- Last modified:
Description
LibreOffice can import documents in the OOXML format (DOCX). A heap buffer overflow existed when replaying deferred parser events for a text box element. A handler object was assumed to be of one type and written to at that type's field layout, but it could be a smaller object, so the write landed past the end of the allocation. In fixed versions the type is checked before the write.
Frequently asked questions
- What is CVE-2026-6047?
- LibreOffice can import documents in the OOXML format (DOCX). A heap buffer overflow existed when replaying deferred parser events for a text box element. A handler object was assumed to be of one type and written to at that type's field layout, but it could be a smaller object, so the write landed past the end of the allocation. In fixed versions the type is checked before the write.
- How severe is CVE-2026-6047?
- CVE-2026-6047 has a CVSS 4.0 base score of 5.4, rated medium severity.
- Is CVE-2026-6047 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2026-6047?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2026-6047 have an EU (EUVD) identifier?
- Yes. CVE-2026-6047 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-36737.
- When was CVE-2026-6047 published?
- CVE-2026-6047 was published on 2026-06-15 and last updated on 2026-06-17.
References
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