# CVE-2022-26307: Weak Master Keys

> Weak master key entropy in LibreOffice allows attackers with config access to brute-force stored web connection passwords.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 25 Jul 2022
- **Updated:** 3 Aug 2024
- **Also known as:** DEBIAN-CVE-2022-26307, GHSA-7p78-g262-f9rp, UBUNTU-CVE-2022-26307

## What is CVE-2022-26307?

CVE-2022-26307 is a high-severity vulnerability in Debian Debian Linux, published on 25 Jul 2022. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

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.

Weakness: CWE-326 (Inadequate Encryption Strength)

## Which versions are affected by CVE-2022-26307?

It affects 2 products.


Products: Debian Debian Linux, Libreoffice Libreoffice.

## How do I fix CVE-2022-26307?

Upgrade to a fixed version.

## Is CVE-2022-26307 being exploited?

There is no known exploitation of CVE-2022-26307 in the wild and no public exploit code.

## Other vulnerabilities in Debian Debian Linux

- [CVE-2015-3306](https://insights.sbomify.com/CVE-2015-3306/): ProFTPD Improper Access Control (critical 10.0, exploited in the wild)
- [CVE-2025-49113](https://insights.sbomify.com/CVE-2025-49113/): RoundCube Webmail Deserialization of Untrusted Data (critical 9.9, exploited in the wild)
- [CVE-2026-24061](https://insights.sbomify.com/CVE-2026-24061/): GNU InetUtils Argument Injection (critical 9.8, exploited in the wild)
- [CVE-2025-39682](https://insights.sbomify.com/CVE-2025-39682/): Linux Kernel Improper Check for Unusual or Exceptional Conditions (critical 9.8, exploited in the wild)
- [CVE-2024-9680](https://insights.sbomify.com/CVE-2024-9680/): Mozilla Firefox Use-After-Free (critical 9.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-26307 and fix it if it is affected.

What it is: CVE-2022-26307 is a high-severity vulnerability in Debian Debian Linux, published on 25 Jul 2022. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2022-26307 in the wild and no public exploit code.

Affected product: Debian Debian Linux. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2022-26307/ (Markdown: https://insights.sbomify.com/CVE-2022-26307/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-26307
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-26307
- OSV: https://osv.dev/vulnerability/CVE-2022-26307

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-26307/
Summaries are generated and may contain mistakes; the official description above is the record.