What is RHSA-2026:42387?

RHSA-2026:42387 is a security advisory published by Red Hat Product Security with High severity. Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Which CVE IDs does RHSA-2026:42387 cover?

RHSA-2026:42387 covers the following CVE IDs: CVE-2026-44838. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of RHSA-2026:42387?

RHSA-2026:42387 has a CVSS v3 base score of 8.1, published by Red Hat Product Security.

Which products are affected by RHSA-2026:42387?

RHSA-2026:42387 affects 4 products, including: Red Hat Hardened Images; rabbitmq-server4-2-main@aarch64 as a component of Red Hat Hardened Images; rabbitmq-server4-2-main@src as a component of Red Hat Hardened Images; rabbitmq-server4-2-main@x86_64 as a component of Red Hat Hardened Images.

RHSA-2026:42387HighCVSS 8.1

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Vendor

Red Hat Product Security

Published

July 21, 2026

Last Modified

July 28, 2026

🔗 CVE IDs covered (1)

CVE-2026-44838 →

📋 Description

CVE-2026-44838 — rabbitmq-server: RabbitMQ: Authorization bypass via regular expression injection in MQTT client ID

🎯 Affected products4

Red Hat Hardened Images
rabbitmq-server4-2-main@aarch64 as a component of Red Hat Hardened Images
rabbitmq-server4-2-main@src as a component of Red Hat Hardened Images
rabbitmq-server4-2-main@x86_64 as a component of Red Hat Hardened Images

✅ Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to: https://images.redhat.com/

🔗 References (5)

selfhttps://access.redhat.com/errata/RHSA-2026:42387
externalhttps://images.redhat.com/
externalhttps://access.redhat.com/security/cve/CVE-2026-44838
externalhttps://access.redhat.com/security/updates/classification/
selfhttps://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_42387.json