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CVE-2026-63277

RCE via calcext:data-mappings, sql provider and jdbc connector

HIGH
8.5
CVSS Score
Published: October 5, 2026 at 11:17 AM UTC
Updated: October 6, 2026 at 03:03 PM UTC
1 product affected across 1 vendorLibreOffice

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Severity
HIGH8.5
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

LibreOffice· Document
60%
26.2 ≤ v < < 26.2.526.2

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

Source: cverecord
https://www.libreoffice.org/about-us/security/advisories/cve-2026-63277

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.5HIGHDocument Fdn.
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-829

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