CVE-2026-89091

Description

A flaw was found in ansible-core. When installing a collection with `ansible-galaxy collection install`, the archive extractor validates member paths using lexical path normalisation (os.path.abspath) instead of resolving symbolic links (os.path.realpath), and it performs no containment check on symlink-typed directory members before creating them. A crafted collection tarball can chain symlink directory entries so that a subsequent file member is written outside the intended destination directory. This allows an attacker who can get a victim to install a malicious collection to overwrite arbitrary files with the privileges of the user running ansible-galaxy, leading to code execution on the control node. This is a bypass of the fix for CVE-2020-10691.

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Produits concernés

• Red Hat Migration Toolkit for Applications 8
• Red Hat Migration Toolkit for Virtualization
• Red Hat OpenShift Service Mesh 3
• Red Hat Advanced Cluster Management for Kubernetes 2
• Red Hat Ansible Automation Platform 2
• Red Hat Ansible Automation Platform Ansible Core 2
• Red Hat Certification Program for Red Hat Enterprise Linux 9
• Red Hat Discovery 2
• Red Hat Enterprise Linux 10
• Red Hat Enterprise Linux 8
• Red Hat Enterprise Linux 9
• Red Hat OpenShift Container Platform 4
• Red Hat OpenStack Platform 17.1
• Red Hat OpenStack Platform 18.0
• Red Hat Satellite 6
• Red Hat Update Infrastructure 5
• Red Hat Self-service automation portal 2

Scores CVSS

Faiblesses (CWE)

• CWE-59

Références

• https://access.redhat.com/security/cve/CVE-2026-89091
• https://bugzilla.redhat.com/show_bug.cgi?id=2531646

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories