# CVE-2026-44919: OpenStack Ironic: Pre-Validation Checksum Calculation allows Denial of Service (DoS) via Infinite Block Devices

> An attacker can cause a denial of service in OpenStack Ironic by triggering an infinite loop during image checksum calculations using a specific URL.

- **Severity:** Medium 4.3 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L`)
- **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:** 14 May 2026
- **Updated:** 21 May 2026
- **Also known as:** DEBIAN-CVE-2026-44919, GHSA-4g73-w726-53h3, PYSEC-2026-2524, UBUNTU-CVE-2026-44919

## What is CVE-2026-44919?

CVE-2026-44919 is a medium-severity denial of service vulnerability in OpenStack Ironic, published on 14 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

In OpenStack Ironic through 35.x before a3f6d73, during image handling, an infinite loop in checksum calculations can occur via the file:///dev/zero URL.

Weakness: CWE-696 (Incorrect Behavior Order)

## Which versions are affected by CVE-2026-44919?

3 open source packages ship an affected version, including ironic. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `ironic` | PyPI | All versions to 36.0.0 | None |
| `ironic` | PyPI | All versions to 36.0.0 | None |
| `ironic` | PyPI | All versions to 36.0.0 | None |

Products: Openstack Ironic.

## How do I fix CVE-2026-44919?

Apply the vendor's patch.

## Is CVE-2026-44919 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-44919 exists.

## Other vulnerabilities in OpenStack Ironic

- [CVE-2026-42997](https://insights.sbomify.com/CVE-2026-42997/): OpenStack Ironic has an Incorrect Resource Transfer Between Spheres (high 7.7)
- [CVE-2026-42510](https://insights.sbomify.com/CVE-2026-42510/): OpenStack Ironic is Vulnerable to Inclusion of Functionality from Untrusted Control Sphere (medium 6.6)
- [CVE-2015-7514](https://insights.sbomify.com/CVE-2015-7514/): Information disclosure in n/a (medium 6.5)
- [CVE-2026-48681](https://insights.sbomify.com/CVE-2026-48681/): OpenStack Ironic allows file overwrite via directory traversal during deployment with a crafted ISO image (medium 5.9)
- [CVE-2026-46447](https://insights.sbomify.com/CVE-2026-46447/): OpenStack Ironic allows Boot Script Injection (medium 5.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-44919 and fix it if it is affected.

What it is: CVE-2026-44919 is a medium-severity denial of service vulnerability in OpenStack Ironic, published on 14 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-44919 exists.

Affected packages and fixed versions:
- ironic (PyPI): affected all versions up to 36.0.0; no fix listed
- ironic (PyPI): affected all versions up to 36.0.0; no fix listed
- ironic (PyPI): affected all versions up to 36.0.0; no fix listed

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-2026-44919/ (Markdown: https://insights.sbomify.com/CVE-2026-44919/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-44919
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-44919
- OSV: https://osv.dev/vulnerability/CVE-2026-44919

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-44919/
Summaries are generated and may contain mistakes; the official description above is the record.