TI-2026-05307 Aliases CVE-2026-6047 GHSA-wq72-h3fh-w757

Heap buffer overflow in OOXML text box element import

LOW 23CWE-787Published 2026-06-15 · Updated 2026-06-15

Key facts

Attack vector: Local
Privileges required: None
User interaction: Passive
Attack complexity: Low
Attack requirements: None
Impact type: —
Confidentiality · integrity · availability: Low · Low · High
Fix status: Partial Red Hat: 4 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00154 4th percentileScored 2026-11-07

Fix Partial LibreOffice (The Document Foundation): < 25.8.7, < 26.2.3Red Hat: 4 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
The Document Foundation	LibreOffice	25.8 to before < 25.8.7; 26.2 to before < 26.2.3	< 25.8.7, < 26.2.3	Patch available	CNA

LibreOffice VendorThe Document Foundation Affected 25.8 to before < 25.8.7; 26.2 to before < 26.2.3 Fixed in < 25.8.7, < 26.2.3 Patch available CNA

Remediation

Fix · CNA LibreOffice (The Document Foundation) Fixed in < 25.8.7, < 26.2.3

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Release · 2026-06-15
The Document Foundation LibreOffice < 25.8.7, < 26.2.3
4 records Highest priority Priority LOW 4 LOW
Other records, highest priority first
- TI-2026-05305 Heap buffer overflow in EMF+ gradient brush importPriority LOW 24
- TI-2026-05301 Heap use-after-free in ODF number-format blank-width parsingPriority LOW 24
- TI-2026-05300 Heap buffer overflow in DXF polyline importPriority LOW 24
Show all 4 records →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat Enterprise Linux 6	Affected	No fix planned: Out of support scope
Red Hat Enterprise Linux 7	Affected	No fix planned: Out of support scope
Red Hat Enterprise Linux 8	Affected	No fix yet: Fix deferred
Red Hat Enterprise Linux 9	Affected	No fix yet: Fix deferred

Timeline

2026-10-02 Threatist record created from CVE-2026-6047
2026-10-03 Alias added: GHSA-wq72-h3fh-w757

References

Other 1

https://www.libreoffice.org/about-us/security/advisories/cve-2026-6047

TI-2019-07233 LibreLogo global-event script execution CVSS 3.1CRITICAL 9.8
TI-2018-12068 Path traversal in [UNKNOWN] libreoffice CVSS 3.0CRITICAL 9.8
TI-2018-07474 An information disclosure vulnerability occurs when LibreOffice 6.0.3 and Apache… CVSS 3.0HIGH 7.5
TI-2019-07230 Code injection in Document Foundation LibreOffice CVSS 3.1CRITICAL 9.8
TI-2018-05018 LibreOffice before 5.4.5 and 6.x before 6.0.1 allows remote attackers to read arbitrary… CVSS 3.0CRITICAL 9.8
TI-2023-01118 Arbitrary file write in libreoffice CVSS 3.1MEDIUM 5.5

See all 92 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences