8.5

CVE-2026-63277: the document foundation libreoffice

CVSS: 8.5v4.0HighDeferred
AliasesUBUNTU-CVE-2026-63277DEBIAN-CVE-2026-63277
Published 05-10-2026Last modified 05-10-2026
Open JSON

Vulnerability summary

CVE-2026-63277 is a high (CVSS 8.5) vulnerability in the document foundation libreoffice. EPSS estimates a 0.15% chance of exploitation in the next 30 days, higher than 3.9% of scored vulnerabilities.

Overall risk
34/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.5/10
010
High · v4.0 (CVE.org)
EPSS score
0.15%
0%100%
Low · Change unavailable
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 2
MGASA-2026-0514RHSA-2026:82013

Timeline

  1. 05-10-2026
    PublishedVulnerability first disclosed.
  2. 05-10-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.15%

Chance of exploitation in the next 30 days

Percentile

4%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

06-10-202619-10-2026
EPSS score
0.15%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • libreofficeAll versions (No fix recorded) | < 4:25.2.3-2+deb13u8 | < 4:26.2.5.2-1
The document foundation1 product
Ubuntu1 product
  • libreofficeAll versions (No fix recorded)

3 vendors · 3 products

References

5 links