# CVE-2026-26104: Udisks: missing authorization check allows unprivileged users to back up luks headers via udisks d-bus api

> Unprivileged users can bypass authorization checks to read and export LUKS encryption headers via the udisks D-Bus API, compromising encrypted volume confidentiality.

- **Severity:** Medium 5.5 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 25 Feb 2026
- **Updated:** 25 Mar 2026
- **Also known as:** DEBIAN-CVE-2026-26104, GHSA-fcvx-497g-6xmw, GHSA-hjgq-ff5j-5v2m

## What is CVE-2026-26104?

CVE-2026-26104 is a medium-severity missing authorization vulnerability in Redhat Enterprise Linux, published on 25 Feb 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A flaw was found in the udisks storage management daemon that allows unprivileged users to back up LUKS encryption headers without authorization. The issue occurs because a privileged D-Bus method responsible for exporting encryption metadata does not perform a policy check. As a result, sensitive cryptographic metadata can be read and written to attacker-controlled locations. This weakens the confidentiality guarantees of encrypted storage volumes.

Weakness: CWE-862 (Missing Authorization)

## Which versions are affected by CVE-2026-26104?

It affects 2 products.


Products: Freedesktop Udisks, Redhat Enterprise Linux.

## How do I fix CVE-2026-26104?

Apply the vendor's patch.

## Is CVE-2026-26104 being exploited?

There is no known exploitation of CVE-2026-26104 in the wild and no public exploit code.

## Other vulnerabilities in Redhat Enterprise Linux

- [CVE-2026-26103](https://insights.sbomify.com/CVE-2026-26103/): Udisks: missing authorization check allows unprivileged users to restore luks headers via udisks d-bus api (high 7.1)
- [CVE-2010-1149](https://insights.sbomify.com/CVE-2010-1149/): Information disclosure in n/a (low 2.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-26104 and fix it if it is affected.

What it is: CVE-2026-26104 is a medium-severity missing authorization vulnerability in Redhat Enterprise Linux, published on 25 Feb 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-26104 in the wild and no public exploit code.

Affected product: Redhat Enterprise 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-2026-26104/ (Markdown: https://insights.sbomify.com/CVE-2026-26104/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-26104
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-26104
- OSV: https://osv.dev/vulnerability/CVE-2026-26104

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-26104/
Summaries are generated and may contain mistakes; the official description above is the record.