What is CVE-2026-55748?

CVE-2026-55748 is a medium-severity vulnerability in OpenStack Horizon, classified under OS Command Injection. CVSS score: 6.0/10. Published 2026-06-17.

How severe is CVE-2026-55748?

Medium severity. CVSS v3 base score is 6.0 out of 10.

RCE in OpenStack Horizon

CVE-2026-55748

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.

Vulnerability class: Command Injection (OS Command Injection)

Published 2026-06-17 · last modified 2026-09-22.

CVSS v3 metric

CVSS v3 base score 6.0 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:L.

EPSS exploit prediction

EPSS: 0.005 (37.3th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 37.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.005 · change: +0.002

Affected products

OpenStack Horizon — versions 8.0.0, 25.4.0, 25.6.0

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

launchpad.net/bugs/2152240 (Issue Tracking, Vendor Advisory)
wiki.openstack.org/wiki/OSSN/OSSN-0097 (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-55748?: CVE-2026-55748 is a medium-severity vulnerability in OpenStack Horizon, classified under OS Command Injection. CVSS score: 6.0/10. Published 2026-06-17.
How severe is CVE-2026-55748?: Medium severity. CVSS v3 base score is 6.0 out of 10.