7.8

CVE-2026-4430: libreoffice Out-of-bounds Write

CVSS: 7.8v3.1HighAnalyzed
AliasesMGASA-2026-0141RHSA-2026:28290RHSA-2026:28922
Published 07-05-2026Last modified 07-05-2026

Vulnerability summary

CVE-2026-4430 is a high (CVSS 7.8) Out-of-bounds Write vulnerability in libreoffice. EPSS estimates a 0.11% chance of exploitation in the next 30 days, higher than 1.1% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.1 (NVD)
EPSS score
0.11%
0%100%
Low · +0.03 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 2 · Related 1

Timeline

  1. 07-05-2026
    PublishedVulnerability first disclosed.
  2. 07-05-2026
    Last modifiedVulnerability information updated.

Description

Out-of-bounds write vulnerability in The Document Foundation LibreOffice via crafted OOXML documents with mismatched encryption salt parameters. This issue affects LibreOffice: from 26.2 before 26.2.3, from 25.8 before 25.8.7.

CVSS metrics

7 scores · 5 sources · 2 versions

EPSS trend

Probability

0.11%

Chance of exploitation in the next 30 days

Percentile

1%

Versus all other CVEs

30-day change

+0.03 pp

From 0.08% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.11%

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

Redhat196 products
  • autocorr-af< 1:6.4.7.2-18.el8_4.1 | < 1:7.1.8.1-15.el9_6.1 | < 1:6.4.7.2-18.el8_8.1 | < 1:7.1.8.1-15.el9_4.1 | < 1:7.1.8.1-14.el9_2.1 | < 1:6.4.7.2-18.el8_6.1 | < 1:7.1.8.1-15.el9_8.1 | < 1:6.4.7.2-20.el8_10
  • autocorr-bg< 1:6.4.7.2-18.el8_4.1 | < 1:7.1.8.1-15.el9_6.1 | < 1:6.4.7.2-18.el8_8.1 | < 1:7.1.8.1-15.el9_4.1 | < 1:7.1.8.1-14.el9_2.1 | < 1:6.4.7.2-18.el8_6.1 | < 1:7.1.8.1-15.el9_8.1 | < 1:6.4.7.2-20.el8_10
  • autocorr-ca< 1:6.4.7.2-18.el8_4.1 | < 1:7.1.8.1-15.el9_6.1 | < 1:6.4.7.2-18.el8_8.1 | < 1:7.1.8.1-15.el9_4.1 | < 1:7.1.8.1-14.el9_2.1 | < 1:6.4.7.2-18.el8_6.1 | < 1:7.1.8.1-15.el9_8.1 | < 1:6.4.7.2-20.el8_10
  • autocorr-cs< 1:6.4.7.2-18.el8_4.1 | < 1:7.1.8.1-15.el9_6.1 | < 1:6.4.7.2-18.el8_8.1 | < 1:7.1.8.1-15.el9_4.1 | < 1:7.1.8.1-14.el9_2.1 | < 1:6.4.7.2-18.el8_6.1 | < 1:7.1.8.1-15.el9_8.1 | < 1:6.4.7.2-20.el8_10
  • autocorr-da< 1:6.4.7.2-18.el8_4.1 | < 1:7.1.8.1-15.el9_6.1 | < 1:6.4.7.2-18.el8_8.1 | < 1:7.1.8.1-15.el9_4.1 | < 1:7.1.8.1-14.el9_2.1 | < 1:6.4.7.2-18.el8_6.1 | < 1:7.1.8.1-15.el9_8.1 | < 1:6.4.7.2-20.el8_10
Debian1 product
  • libreoffice< 4:7.4.7-1+deb12u11 | < 4:25.2.3-2+deb13u4 | < 4:26.2.3.2-2
Libreoffice1 product
  • libreoffice≥ 25.8.0.0, < 25.8.7.0 | ≥ 26.2.0.0, < 26.2.3.0
Mageia1 product
  • libreoffice< 24.2.7.2-1.4.mga9
Ubuntu1 product
  • libreofficeAll versions (No fix recorded) | < 1:7.3.7-0ubuntu0.22.04.11 | < 4:24.2.7-0ubuntu0.24.04.5 | < 4:25.8.7-0ubuntu0.25.10.1 | < 4:26.2.3.2-0ubuntu0.26.04.1

5 vendors · 200 products · Showing 200 of 203. Use Open JSON for the complete list.

References

31 links
Show all 31 references