CVE-2026-63274: Heap buffer overflow in PDF import stream handling
The Document Foundation · LibreOffice
Vendor fix available · Affected: The Document Foundation LibreOffice · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 9% of scored CVEs
DescriptionCVE.org
LibreOffice Draw can import PDF documents. A heap buffer overflow existed when importing a stream object. The length of the stream was taken from the object's own dictionary and was not checked against the number of bytes actually present, so copying the stream read and wrote past the end of the buffer holding it. In fixed versions the declared length is clamped to the bytes actually read.
Affected products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- The Document Foundation · LibreOfficefrom 26.2 before < 26.2.5
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Unlikely (under 1%). EPSS under 1%, or no score yet.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- The Document Foundation
- Published
- September 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-63274 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.