CVE-2026-63274Heap buffer overflow in PDF import stream handling
Updated under an hour ago ()
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It affects The Document Foundation LibreOffice. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 5.4 MEDIUM (v4.0, CNA)CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/E:P
- Weakness (CWE)
- CWE-787, CWE-125
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Document Fdn.
- NVD analysis
- Deferred
- Record last updated
- Sep 28, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
The Document Foundation LibreOffice document_foundation:libreoffice (from the name) | from 26.2 before < 26.2.5 | CNA record |
References
- https://www.libreoffice.org/about-us/security/advisories/cve-2026-63274
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.