CVE-2022-26307 | Weak Master Keys

LibreOffice supports the storage of passwords for web connections in the user’s configuration database. The stored passwords are encrypted with a single master key provided by the user. A flaw in LibreOffice existed where master key was poorly encoded resulting in weakening its entropy from 128 to 43 bits making the stored passwords vulerable to a brute force attack if an attacker has access to the users stored config. This issue affects: The Document Foundation LibreOffice 7.2 versions prior to 7.2.7; 7.3 versions prior to 7.3.3.

Published: 2022-07-25 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2022-26307 is rated Moderate Risk (53.5/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.29%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2022-26307

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 2026-05-29 0.37% 0.29% -0.09%
2 2026-05-22 0.26% 0.37% +0.11%
3 2025-11-21 — 0.26% —

Full EPSS history (12 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2022-26307

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.8 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 5.9 [email protected]

Weakness enumeration for CVE-2022-26307

OS Trackers for CVE-2022-26307

vendor priority summary link
alpine high CVE-2022-26307: 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-2022-26307
debian not yet assigned CVE-2022-26307 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-2022-26307
redhat medium — https://access.redhat.com/security/cve/CVE-2022-26307
suse low CVE-2022-26307 severity low: 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-2022-26307/
ubuntu medium CVE-2022-26307 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-2022-26307

Affected software / configurations for CVE-2022-26307

Vendor Product Version Raw CPE
libreoffice libreoffice >= 7.2.0, < 7.2.7 cpe:2.3:a:libreoffice:libreoffice:*:*:*:*:*:*:*:*
libreoffice libreoffice >= 7.3.0, < 7.3.3 cpe:2.3:a:libreoffice:libreoffice:*:*:*:*:*:*:*:*
debian debian_linux 10.0 cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

References for CVE-2022-26307

cvelogic Threat Intelligence