5.4

CVE-2026-63279: the document foundation libreoffice Out-of-bounds Read

CVSS: 5.4v4.0MediumDeferred
AliasesUBUNTU-CVE-2026-63279DEBIAN-CVE-2026-63279
Published 22-09-2026Last modified 22-09-2026
Open JSON

Vulnerability summary

CVE-2026-63279 is a medium (CVSS 5.4) Out-of-bounds Read vulnerability in the document foundation libreoffice. EPSS estimates a 0.15% chance of exploitation in the next 30 days, higher than 4.1% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.4/10
010
Medium · 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 · Related 1
MGASA-2026-0514USN-8868-1

Timeline

  1. 22-09-2026
    PublishedVulnerability first disclosed.
  2. 22-09-2026
    Last modifiedVulnerability information updated.

Description

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.

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

23-09-202620-10-2026
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+deb13u7 | < 4:26.2.5.2-1
The document foundation1 product
Ubuntu1 product
  • libreofficeAll versions (No fix recorded) | < 1:7.3.7-0ubuntu0.22.04.13 | < 4:24.2.7-0ubuntu0.24.04.7 | < 4:26.2.6.3-0ubuntu0.26.04.2

3 vendors · 3 products

References

6 links