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Fencer Vulns
high 7.5

CVE-2022-26305 json

Execution of Untrusted Macros Due to Improper Certificate Validation

published 2022-07-25 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-30866

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.2%
EPSS 1.2% chance of exploitation in 30 days, percentile 69%
public exploits
0
none known

Summary

An Improper Certificate Validation vulnerability in LibreOffice existed where determining if a macro was signed by a trusted author was done by only matching the serial number and issuer string of the used certificate with that of a trusted certificate. This is not sufficient to verify that the macro was actually signed with the certificate. An adversary could therefore create an arbitrary certificate with a serial number and an issuer string identical to a trusted certificate which LibreOffice would present as belonging to the trusted author, potentially leading to the user to execute arbitrary code contained in macros improperly trusted. This issue affects: The Document Foundation LibreOffice 7.2 versions prior to 7.2.7; 7.3 versions prior to 7.3.1.

Patch / fix

  • The Document Foundation LibreOffice 7.2.7, 7.3.1
  • libreoffice Debian 14, Debian 13, Debian 12 1:7.3.2~rc2-1

debian advisories DEBIAN-CVE-2022-26305

  • libreoffice Ubuntu 18.04 LTS 1:6.0.7-0ubuntu0.18.04.12
  • libreoffice Ubuntu 20.04 LTS 1:6.4.7-0ubuntu0.20.04.5

ubuntu advisories UBUNTU-CVE-2022-26305

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 9 1:7.1.8.1-8.el9_1
  • autocorr-af RHEL 9 1:7.1.8.1-8.el9_1
  • autocorr-bg RHEL 9 1:7.1.8.1-8.el9_1
  • autocorr-ca RHEL 9 1:7.1.8.1-8.el9_1
  • autocorr-cs RHEL 9 1:7.1.8.1-8.el9_1
  • autocorr-da RHEL 9 1:7.1.8.1-8.el9_1
  • autocorr-de RHEL 9 1:7.1.8.1-8.el9_1
  • autocorr-el RHEL 9 1:7.1.8.1-8.el9_1

red hat advisories RHSA-2023:0304RHSA-2023:0089

  • libreoffice SLE Workstation Extension 15 SP4, SLE Workstation Extension 15 SP3, SLE Module for Package Hub 15 SP4 +3 more 7.3.6.2-150300.14.22.24.2
  • libreoffice SLE Workstation Extension 12 SP5, SLE Software Development Kit 12 SP5 7.3.6.2-48.28.1

suse advisories SUSE-SU-2022:3650-1SUSE-SU-2022:3602-1

  • libreoffice openSUSE Tumbleweed 7.4.2.3-1.1

opensuse advisories openSUSE-SU-2024:12452-1

  • autocorr-af AlmaLinux 9 1:7.1.8.1-8.el9_1.alma
  • autocorr-bg AlmaLinux 9 1:7.1.8.1-8.el9_1.alma
  • autocorr-ca AlmaLinux 9 1:7.1.8.1-8.el9_1.alma
  • autocorr-cs AlmaLinux 9 1:7.1.8.1-8.el9_1.alma
  • autocorr-da AlmaLinux 9 1:7.1.8.1-8.el9_1.alma
  • autocorr-de AlmaLinux 9 1:7.1.8.1-8.el9_1.alma
  • autocorr-el AlmaLinux 9 1:7.1.8.1-8.el9_1.alma
  • autocorr-en AlmaLinux 9 1:7.1.8.1-8.el9_1.alma

almalinux advisories ALSA-2023:0304ALSA-2023:0089

  • libreoffice Rocky Linux 9 1:7.1.8.1-8.el9_1
  • libreoffice Rocky Linux 8 1:6.4.7.2-12.el8_7

rocky linux advisories RLSA-2023:0304RLSA-2023:0089

  • libreoffice Alpine 3.24, Alpine 3.23, Alpine 3.22 +7 more 7.2.7.2-r0

alpine advisories ALPINE-CVE-2022-26305

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • libreoffice-fresh Arch Linux 7.3.3-1
  • libreoffice-still Arch Linux 7.2.7-1

arch linux advisories AVG-2783AVG-2784

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-2022-26305 updated cvss 7.1

libreoffice: Execution of Untrusted Macros Due to Improper Certificate Validation

  • Red Hat Enterprise Linux 8 autocorr-af, autocorr-bg, autocorr-ca, autocorr-cs, autocorr-da, autocorr-de, +98 more
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux 9 autocorr-af, autocorr-bg, autocorr-ca, autocorr-cs, autocorr-da, autocorr-de, +101 more
    affected: no fix available
  • Red Hat CodeReady Linux Builder (v. 8) libreoffice-sdk 6.4.7.2-12.el8_7
    fixed: vendor fix RHSA-2023:0089
  • Red Hat CodeReady Linux Builder (v. 9) libreoffice-sdk 7.1.8.1-8.el9_1
    fixed: vendor fix RHSA-2023:0304
  • Red Hat Enterprise Linux AppStream (v. 8) autocorr-af 6.4.7.2-12.el8_7, autocorr-bg 6.4.7.2-12.el8_7, autocorr-ca 6.4.7.2-12.el8_7, autocorr-cs 6.4.7.2-12.el8_7, autocorr-da 6.4.7.2-12.el8_7, autocorr-de 6.4.7.2-12.el8_7, +95 more
    fixed: vendor fix RHSA-2023:0089
  • Red Hat Enterprise Linux AppStream (v. 9) autocorr-af 7.1.8.1-8.el9_1, autocorr-bg 7.1.8.1-8.el9_1, autocorr-ca 7.1.8.1-8.el9_1, autocorr-cs 7.1.8.1-8.el9_1, autocorr-da 7.1.8.1-8.el9_1, autocorr-de 7.1.8.1-8.el9_1, +100 more
    fixed: vendor fix RHSA-2023:0304
  • Red Hat Enterprise Linux 6 autocorr-af, autocorr-bg, autocorr-ca, autocorr-cs, autocorr-da, autocorr-de, +60 more Red Hat Enterprise Linux 7 autocorr-af, autocorr-bg, autocorr-ca, autocorr-cs, autocorr-da, autocorr-de, +105 more
    not affected: vulnerable code not present

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

Exploit prediction

1.24% chance of exploitation in the next 30 days, higher than 69% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

  • The Document Foundation LibreOffice

Classification

Weakness
  • CWE-295 Improper Certificate Validation

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.