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Fencer Vulns
high 7.8

CVE-2026-4430 json

Heap Buffer Overflow in AgileEngine

published 2026-05-07 6 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-28327

cvss
7.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.1%
EPSS 0.1% chance of exploitation in 30 days, percentile 0%
public exploits
0
none known

Summary

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.

Patch / fix

  • The Document Foundation LibreOffice 25.8.7, 26.2.3
  • libreoffice Debian 12 4:7.4.7-1+deb12u11
  • libreoffice Debian 13 4:25.2.3-2+deb13u4
  • libreoffice Debian 14 4:26.2.3.2-2

debian advisories DEBIAN-CVE-2026-4430

  • libreoffice Ubuntu 22.04 LTS 1:7.3.7-0ubuntu0.22.04.11
  • libreoffice Ubuntu 24.04 LTS 4:24.2.7-0ubuntu0.24.04.5
  • libreoffice Ubuntu 25.10 4:25.8.7-0ubuntu0.25.10.1
  • libreoffice Ubuntu 26.04 LTS 4:26.2.3.2-0ubuntu0.26.04.1

ubuntu advisories UBUNTU-CVE-2026-4430

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • libreoffice RHEL 8 1:6.4.7.2-20.el8_10
  • autocorr-af RHEL 8 1:6.4.7.2-20.el8_10
  • autocorr-bg RHEL 8 1:6.4.7.2-20.el8_10
  • autocorr-ca RHEL 8 1:6.4.7.2-20.el8_10
  • autocorr-cs RHEL 8 1:6.4.7.2-20.el8_10
  • autocorr-da RHEL 8 1:6.4.7.2-20.el8_10
  • autocorr-de RHEL 8 1:6.4.7.2-20.el8_10
  • autocorr-en RHEL 8 1:6.4.7.2-20.el8_10

red hat advisories RHSA-2026:46386RHSA-2026:39119RHSA-2026:38507RHSA-2026:38508RHSA-2026:37250RHSA-2026:37251

  • libreoffice SLE Workstation Extension 15 SP7, SLE Module for Package Hub 15 SP7 26.2.5.1-150500.20.37.1

suse advisories SUSE-SU-2026:3140-1

  • libreoffice openSUSE Leap 16.0 26.8.1.1-bp160.1.1

opensuse advisories openSUSE-SU-2026:22216-1

  • libreoffice AlmaLinux 8 1:6.4.7.2-20.el8_10.alma.1
  • autocorr-af AlmaLinux 8 1:6.4.7.2-20.el8_10.alma.1
  • autocorr-bg AlmaLinux 8 1:6.4.7.2-20.el8_10.alma.1
  • autocorr-ca AlmaLinux 8 1:6.4.7.2-20.el8_10.alma.1
  • autocorr-cs AlmaLinux 8 1:6.4.7.2-20.el8_10.alma.1
  • autocorr-da AlmaLinux 8 1:6.4.7.2-20.el8_10.alma.1
  • autocorr-de AlmaLinux 8 1:6.4.7.2-20.el8_10.alma.1
  • autocorr-en AlmaLinux 8 1:6.4.7.2-20.el8_10.alma.1

almalinux advisories ALSA-2026:28922ALSA-2026:28290

  • libreoffice Rocky Linux 9 1:7.1.8.1-15.el9_8.1
  • libreoffice Rocky Linux 8 1:6.4.7.2-20.el8_10

rocky linux advisories RLSA-2026:28290RLSA-2026:28922

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-4430 updated cvss 7.6

LibreOffice: LibreOffice: Denial of Service via crafted OOXML documents

  • Red Hat Enterprise Linux 6 autocorr-af, autocorr-bg, autocorr-ca, autocorr-cs, autocorr-da, autocorr-de, +60 more
    affected: workaround, no fix planned “Will not fix”
  • Red Hat CodeReady Linux Builder EUS (v.9.6) libreoffice-sdk 7.1.8.1-15.el9_6.1
    fixed: vendor fix RHSA-2026:37250
  • Red Hat Enterprise Linux AppStream (v. 8) autocorr-af 6.4.7.2-20.el8_10, autocorr-bg 6.4.7.2-20.el8_10, autocorr-ca 6.4.7.2-20.el8_10, autocorr-cs 6.4.7.2-20.el8_10, autocorr-da 6.4.7.2-20.el8_10, autocorr-de 6.4.7.2-20.el8_10, +95 more
    fixed: vendor fix RHSA-2026:28922
  • Red Hat Enterprise Linux AppStream (v. 9) autocorr-af 7.1.8.1-15.el9_8.1, autocorr-bg 7.1.8.1-15.el9_8.1, autocorr-ca 7.1.8.1-15.el9_8.1, autocorr-cs 7.1.8.1-15.el9_8.1, autocorr-da 7.1.8.1-15.el9_8.1, autocorr-de 7.1.8.1-15.el9_8.1, +100 more
    fixed: vendor fix RHSA-2026:28290
  • Red Hat Enterprise Linux AppStream AUS (v.8.4) autocorr-af 6.4.7.2-18.el8_4.1, autocorr-bg 6.4.7.2-18.el8_4.1, autocorr-ca 6.4.7.2-18.el8_4.1, autocorr-cs 6.4.7.2-18.el8_4.1, autocorr-da 6.4.7.2-18.el8_4.1, autocorr-de 6.4.7.2-18.el8_4.1, +95 more
    fixed: vendor fix RHSA-2026:37249
  • Red Hat Enterprise Linux AppStream AUS (v.8.6) autocorr-af 6.4.7.2-18.el8_6.1, autocorr-bg 6.4.7.2-18.el8_6.1, autocorr-ca 6.4.7.2-18.el8_6.1, autocorr-cs 6.4.7.2-18.el8_6.1, autocorr-da 6.4.7.2-18.el8_6.1, autocorr-de 6.4.7.2-18.el8_6.1, +95 more
    fixed: vendor fix RHSA-2026:39119
  • Red Hat Enterprise Linux AppStream E4S (v.8.8) autocorr-af 6.4.7.2-18.el8_8.1, autocorr-bg 6.4.7.2-18.el8_8.1, autocorr-ca 6.4.7.2-18.el8_8.1, autocorr-cs 6.4.7.2-18.el8_8.1, autocorr-da 6.4.7.2-18.el8_8.1, autocorr-de 6.4.7.2-18.el8_8.1, +95 more
    fixed: vendor fix RHSA-2026:37251
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) autocorr-af 7.1.8.1-14.el9_2.1, autocorr-bg 7.1.8.1-14.el9_2.1, autocorr-ca 7.1.8.1-14.el9_2.1, autocorr-cs 7.1.8.1-14.el9_2.1, autocorr-da 7.1.8.1-14.el9_2.1, autocorr-de 7.1.8.1-14.el9_2.1, +100 more
    fixed: vendor fix RHSA-2026:38508
show 8 more
  • Red Hat Enterprise Linux AppStream E4S (v.9.4) autocorr-af 7.1.8.1-15.el9_4.1, autocorr-bg 7.1.8.1-15.el9_4.1, autocorr-ca 7.1.8.1-15.el9_4.1, autocorr-cs 7.1.8.1-15.el9_4.1, autocorr-da 7.1.8.1-15.el9_4.1, autocorr-de 7.1.8.1-15.el9_4.1, +100 more
    fixed: vendor fix RHSA-2026:38507
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) autocorr-af 7.1.8.1-15.el9_6.1, autocorr-bg 7.1.8.1-15.el9_6.1, autocorr-ca 7.1.8.1-15.el9_6.1, autocorr-cs 7.1.8.1-15.el9_6.1, autocorr-da 7.1.8.1-15.el9_6.1, autocorr-de 7.1.8.1-15.el9_6.1, +100 more
    fixed: vendor fix RHSA-2026:37250
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) autocorr-af 6.4.7.2-18.el8_4.1, autocorr-bg 6.4.7.2-18.el8_4.1, autocorr-ca 6.4.7.2-18.el8_4.1, autocorr-cs 6.4.7.2-18.el8_4.1, autocorr-da 6.4.7.2-18.el8_4.1, autocorr-de 6.4.7.2-18.el8_4.1, +95 more
    fixed: vendor fix RHSA-2026:37249
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) autocorr-af 6.4.7.2-18.el8_6.1, autocorr-bg 6.4.7.2-18.el8_6.1, autocorr-ca 6.4.7.2-18.el8_6.1, autocorr-cs 6.4.7.2-18.el8_6.1, autocorr-da 6.4.7.2-18.el8_6.1, autocorr-de 6.4.7.2-18.el8_6.1, +95 more
    fixed: vendor fix RHSA-2026:39119
  • Red Hat Enterprise Linux AppStream TUS (v.8.8) autocorr-af 6.4.7.2-18.el8_8.1, autocorr-bg 6.4.7.2-18.el8_8.1, autocorr-ca 6.4.7.2-18.el8_8.1, autocorr-cs 6.4.7.2-18.el8_8.1, autocorr-da 6.4.7.2-18.el8_8.1, autocorr-de 6.4.7.2-18.el8_8.1, +95 more
    fixed: vendor fix RHSA-2026:37251
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) libreoffice-sdk 7.1.8.1-15.el9_8.1
    fixed: vendor fix RHSA-2026:28290
  • Red Hat Enterprise Linux CRB (v. 8) libreoffice-sdk 6.4.7.2-20.el8_10
    fixed: vendor fix RHSA-2026:28922
  • Red Hat Enterprise Linux Server Optional (v. 7 ELS) autocorr-af 5.3.6.1-28.el7_9, autocorr-bg 5.3.6.1-28.el7_9, autocorr-ca 5.3.6.1-28.el7_9, autocorr-cs 5.3.6.1-28.el7_9, autocorr-da 5.3.6.1-28.el7_9, autocorr-de 5.3.6.1-28.el7_9, +104 more
    fixed: vendor fix RHSA-2026:46386

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
6 mo ago

Exploit prediction

0.08% chance of exploitation in the next 30 days, higher than 0% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 5.4 CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/E:P
CNA 4.0 5.4 CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

  • The Document Foundation LibreOffice

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.