CVE-2026-63279
MediumCVSS 5.4Exploitation Probability (EPSS)
Low risk7th percentile - higher than 7% of all known CVEs
Summary
LibreOffice can import PICT images, which may be embedded in documents. An out-of-bounds read occurs when importing an image that uses a colour palette because the palette index is not checked against the number of entries. In fixed versions, the palette index is limited to the entries present.
Risk Assessment
Opening a malicious document with a specially crafted PICT image could lead to reading sensitive memory data or cause a crash. This may result in information disclosure or system instability.
Recommendation
Update LibreOffice to the latest version that includes the fix limiting the palette index. Avoid opening documents from untrusted sources.
Other vulnerabilities in LibreOffice
See all- CVE-2016-4324High
Use-after-free vulnerability in LibreOffice before 5.1.4 allows remote attackers to execute arbitrary code via a crafted RTF file, related to stylesheet and superscript tokens.
- CVE-2016-0795High
LibreOffice versions before 5.0.5 allow remote attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact via a crafted LwpTocSuperLayout record in a LotusWordPro (lwp) document.
- CVE-2014-9093High
LibreOffice versions before 4.3.5 allow remote attackers to cause a denial of service (invalid write operation and crash) and possibly execute arbitrary code via a crafted RTF file.
- CVE-2014-0247High
LibreOffice version 4.2.4 automatically executes unspecified VBA macros, which may lead to unknown impacts and attack vectors.
- CVE-2017-8358Critical
LibreOffice before 2017-03-17 has an out-of-bounds write caused by a heap-based buffer overflow related to the ReadJPEG function in vcl/source/filter/jpeg/jpegc.cxx.
- CVE-2017-7882Critical
LibreOffice before March 14, 2017, has an out-of-bounds write related to the HWPFile::TagsRead function in hwpfilter/source/hwpfile.cxx.
- CVE-2017-7870Critical
LibreOffice before 2017-01-02 has an out-of-bounds write caused by a heap-based buffer overflow related to the tools::Polygon::Insert function in tools/source/generic/poly.cxx.
- CVE-2017-7856Critical
LibreOffice before 2017-03-11 has an out-of-bounds write caused by a heap-based buffer overflow in the SVMConverter::ImplConvertFromSVM1 function.
- CVE-2016-10327Critical
LibreOffice before December 22, 2016, has an out-of-bounds write caused by a heap-based buffer overflow related to the EnhWMFReader::ReadEnhWMF function in vcl/source/filter/wmf/enhwmf.cxx.
- CVE-2026-63278Medium
In LibreOffice, URLs could be constructed that expand environment variables or INI file values, potentially exfiltrating sensitive information to a remote server when opening a document containing such links. The check added for CVE-2024-12426 did not recognise every way of naming the package content provider, so a URL naming it differently still reached the expansion. In fixed versions, the package content provider is matched when the URL is checked.
Original NVD description (English source)
LibreOffice can import PICT images, which may be embedded in documents. An out of bounds read existed when importing an image that uses a colour palette. The palette index held in the image data was used without being checked against the number of entries the palette has, so an index past the last entry read memory outside the palette. In fixed versions the palette index is limited to the entries present.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS