CVE-2026-63274
Heap buffer overflow in PDF import stream handling
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-787 CWE-125 |
| Vendor | the document foundation |
| Product | libreoffice |
| Published | Sep 22, 2026 |
| Last Updated | Sep 22, 2026 |
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Affected Versions
The Document Foundation / LibreOffice
26.2 < < 26.2.5
References
Credits
Claude, found by Anthropic using agents to study the security of open-source projects Ada Logics, validating and reporting Caolán McNamara of Collabora Productivity