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.
Conclusion & alert: CVE-2022-26305 is rated Moderate Risk (50.4/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.98%). Mandatory action: Review affected assets and schedule remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.71% | 0.98% | +0.28% |
| 2 | 2026-01-01 | 0.62% | 0.71% | +0.08% |
| 3 | 2025-12-13 | — | 0.62% | — |
Full EPSS history (15 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 7.5 | 3.1 | HIGH |
|
1.6 | 5.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
high | CVE-2022-26305: 1 source package rows (libreoffice); 11 state rows across 7 repos (3.17-community, 3.18-community, 3.19-community, 3.20-community, 3.21-community, 3.22-community, edge-community); fixed 7, open 4. | https://security.alpinelinux.org/vuln/CVE-2022-26305 |
debian
|
not yet assigned | CVE-2022-26305 not yet assigned priority: Debian including 1 source packages (libreoffice), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2022-26305 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2022-26305 |
suse
|
high | CVE-2022-26305 severity important: SUSE including 342 source package names (libreoffice-7.3.6.2-150300.14.22.24.2, libreoffice-7.3.6.2-48.28.1, …), 954 product×package rows across 9 product lines (SUSE Linux Enterprise Module for Package Hub 15 SP3, SUSE Linux Enterprise Module for Package Hub 15 SP4, … (9 product lines)): Fixed 954. | https://www.suse.com/security/cve/CVE-2022-26305/ |
ubuntu
|
medium | CVE-2022-26305 medium priority: Ubuntu including 1 source packages (libreoffice), 8 status rows across 8 suites (bionic, focal, jammy, kinetic, lunar, trusty, upstream, xenial): not-affected 3, released 3, ignored 2. | https://ubuntu.com/security/CVE-2022-26305 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| libreoffice | libreoffice | >= 7.2.0, < 7.2.7 | cpe:2.3:a:libreoffice:libreoffice:*:*:*:*:*:*:*:* |
| libreoffice | libreoffice | >= 7.3.0, < 7.3.2 | cpe:2.3:a:libreoffice:libreoffice:*:*:*:*:*:*:*:* |