🛡️ CVE-2026-55748 — horizon

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is high, an attacker needs administrative privileges on the target. A user must be tricked into taking some action. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability low.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:L

• Attack vector: Network — reachable from anywhere that can route to the service.
• Attack complexity: High — the attacker first has to win a race, learn a secret or otherwise prepare the target.
• Privileges required: High — administrative rights are needed first.
• User interaction: Required — someone has to click, open or visit something.
• Scope: Unchanged — the damage stays inside the vulnerable component.
• Confidentiality impact: High — total loss, or loss the attacker controls.
• Integrity impact: High — total loss, or loss the attacker controls.
• Availability impact: Low — limited, and the attacker does not choose what is affected.

Weakness class

CVE-2026-55748 is classified as CWE-78: OS Command Injection. Untrusted input reaches a shell command without neutralisation, so an attacker can run arbitrary operating system commands.

Affected software

CVE-2026-55748 is recorded against 2 packages.

• horizon
• unknown

Timeline and source

Published on 13 July 2026 and last revised on 11 August 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

nvd.nist.gov (Advisory)
github.com (Package)
launchpad.net (Web)
wiki.openstack.org (Web)
pypi.org (Package)
github.com (Advisory)

Other advisories for this package

horizon has other advisories on record. If you are patching this one, these are worth checking on the same host:

• CVE-2014-0157 (published 6 Jul 2026)
• CVE-2014-3474 (2.0 Low, published 2 Jul 2026)
• DEBIAN-CVE-2026-55748 (published 17 Jun 2026)
• UBUNTU-CVE-2026-55748 (published 17 Jun 2026)
• DEBIAN-CVE-2026-43002 (published 5 May 2026)
• UBUNTU-CVE-2026-43002 (published 5 May 2026)
• CVE-2026-43002 (published 5 May 2026)
• DLA-3678-1 (published 1 Dec 2023)

Same weakness in other software

These advisories are the same class of weakness (CWE-78: OS Command Injection) in other software:

• CVE-2023-49900 (9.8 Critical, published 16 Jul 2026)
• CVE-2024-0815 (8.0 High, published 7 Jul 2026)
• CVE-2023-5002 (6.0 Medium, published 7 Jul 2026)
• CVE-2022-38649 (9.8 Critical, published 29 Jun 2026)
• CVE-2022-40189 (9.8 Critical, published 29 Jun 2026)
• CVE-2021-21386 (9.5 Critical, published 29 Jun 2026)
• CVE-2022-45899 (6.5 Medium, published 8 May 2026)
• CVE-2022-50994 (8.1 High, published 8 May 2026)

Details

Affected Packages

References