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CVE-2026-89091

8.8 · HIGH

A flaw was found in ansible-core.

Published Oct 8, 2026CWE-59EPSS 0.48%

Overview

CVE-2026-89091 is a high-severity vulnerability. It was published on October 8, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refaccess.redhat.com/security/cve/CVE-2026-89091Refbugzilla.redhat.com/show_bug.cgi?id=2531646

How CyberStrike helps

Frequently asked questions

What is CVE-2026-89091?

CVE-2026-89091 is a high-severity vulnerability. It was published on October 8, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

How severe is CVE-2026-89091?

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-89091?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-89091?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-89091 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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