# CVE-2026-55748: OpenStack Horizon RC file generation does not escape special characters in project names

> Attackers can execute arbitrary commands via shell metacharacters in crafted project names within OpenStack Horizon RC file scripts.

- **Severity:** Medium 6.0 (`CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 17 Jun 2026
- **Updated:** 17 Jun 2026
- **Also known as:** DEBIAN-CVE-2026-55748, GHSA-6wrm-x65g-hr4p, PYSEC-2026-2519, UBUNTU-CVE-2026-55748

## What is CVE-2026-55748?

CVE-2026-55748 is a medium-severity command injection vulnerability in OpenStack Horizon, published on 17 Jun 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

### Official description

OpenStack Horizon before 25.7.4 produces scripts for OpenStack RC file downloading that may have a crafted project name with shell metacharacters. NOTE: some parties consider this a security hardening opportunity to address certain types of user error, not a vulnerability.

Weakness: CWE-78 (Improper Neutralization of Special Elements used in an OS Command)

## Which versions are affected by CVE-2026-55748?

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


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `horizon` | PyPI | All versions to 25.7.3 | None |
| `horizon` | PyPI | All versions to 25.7.3 | None |
| `horizon` | PyPI | All versions to 25.7.3 | None |

Products: Openstack Horizon.

## How do I fix CVE-2026-55748?

Upgrade to a fixed version.

## Is CVE-2026-55748 being exploited?

There is no known exploitation of CVE-2026-55748 in the wild and no public exploit code.

## Other vulnerabilities in OpenStack Horizon

- [CVE-2012-2144](https://insights.sbomify.com/CVE-2012-2144/): OpenStack Horizon Session Fixation (medium 6.8)
- [CVE-2022-45582](https://insights.sbomify.com/CVE-2022-45582/): Horizon Web Dashboard Open Redirect vulnerability (medium 6.1)
- [CVE-2012-3540](https://insights.sbomify.com/CVE-2012-3540/): Open redirect in n/a (medium 5.8)
- [CVE-2013-4471](https://insights.sbomify.com/CVE-2013-4471/): Auth bypass in n/a (medium 5.5)
- [CVE-2026-43002](https://insights.sbomify.com/CVE-2026-43002/): OpenStack Horizon has Incorrect Behavior Order (medium 5.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-55748 and fix it if it is affected.

What it is: CVE-2026-55748 is a medium-severity command injection vulnerability in OpenStack Horizon, published on 17 Jun 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-55748 in the wild and no public exploit code.

Affected packages and fixed versions:
- horizon (PyPI): affected all versions up to 25.7.3; no fix listed
- horizon (PyPI): affected all versions up to 25.7.3; no fix listed
- horizon (PyPI): affected all versions up to 25.7.3; 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-2026-55748/ (Markdown: https://insights.sbomify.com/CVE-2026-55748/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-55748
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-55748
- OSV: https://osv.dev/vulnerability/CVE-2026-55748

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-55748/
Summaries are generated and may contain mistakes; the official description above is the record.