TI-2026-45129 Aliases CVE-2026-63272 GHSA-c374-v965-jr6c

Heap buffer overflow in WMF text record import

LOW 24CWE-125Published 2026-09-22 · Updated 2026-09-22

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: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

LibreOffice can import WMF graphics, which may be embedded in documents. A heap buffer overflow existed when importing a text record that carries its own character advance widths. The count of advance values and the length of the text were read separately from the file and were not required to agree, so drawing the text walked the advance array by character position and ran past its end when the array was the shorter of the two. In fixed versions an advance array shorter than its text is ignored.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00204 10th percentileScored 2026-11-07

Fix Fixed LibreOffice (The Document Foundation): < 26.2.5

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	26.2 to before < 26.2.5	< 26.2.5	Patch available	CNA

LibreOffice VendorThe Document Foundation Affected 26.2 to before < 26.2.5 Fixed in < 26.2.5 Patch available CNA

Remediation

Fix · CNA LibreOffice (The Document Foundation) Fixed in < 26.2.5

Fixed in the same release

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

Release · 2026-09-22
The Document Foundation LibreOffice < 26.2.5
7 records Highest priority Priority LOW 7 LOW
Other records, highest priority first
- TI-2026-45134 Package URLs can be used to exfiltrate arbitrary INI file values and environment variablesPriority LOW 29
- TI-2026-45133 Stack buffer overflow in CFF to Type 1 font conversionPriority LOW 24
- TI-2026-45132 Stack buffer overflow in CFF font hint handlingPriority LOW 24
Show all 7 records →

Vendor assessments

Red Hat

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

Not affected: 4 products

Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 9

Timeline

2026-10-02 Threatist record created from CVE-2026-63272
2026-10-03 Alias added: GHSA-c374-v965-jr6c

References

Other 1

https://www.libreoffice.org/about-us/security/advisories/cve-2026-63272

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