CVE-2026-63277: high-severity vulnerability in The Document Foundation LibreOffice
RCE via calcext:data-mappings, sql provider and jdbc connector
Published
41Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 8.5epss 0.1%
from disclosure to weapon1 days
Published on NVDOct 5
1st PoC+1d
exploitation probability
0.1%top 97% of all CVEs
observed exploitation
nono source reports it
1 public exploit(s)
LibreOffice Calc can link a cell range to an external data source, and the link is saved in the document. A document could name a Java database driver for such a link to be loaded from a remote location, so opening the document could run Java code from that location. In fixed versions an entry in a Java class path has to be a file URL.
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Affected products
The Document Foundation · LibreOfficepublic PoCs found — 1
githubgithub.com/HORKimhab/CVE-2026-63277★ 0⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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