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CVE-2026-96275

8.8 · HIGH

A malicious or compromised Flatpak repository can write attacker-controlled content to arbitrary locations on the host filesystem via extract_extra_data().

Published Sep 23, 2026CWE-22EPSS 0.56%

Overview

CVE-2026-96275 is a high-severity vulnerability. It was published on September 23, 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 malicious or compromised Flatpak repository can write attacker-controlled content to arbitrary locations on the host filesystem via extract_extra_data(). On system installs, the write happens as root. Two issues combine: `files/extra` is resolved via path operations that follow symlinks, and blob names from `xa.extra-data-sources` are not sanitized against `..` traversal.

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/errata/RHSA-2026:80497Refaccess.redhat.com/errata/RHSA-2026:80498Refaccess.redhat.com/errata/RHSA-2026:80687Refaccess.redhat.com/errata/RHSA-2026:89733Refaccess.redhat.com/errata/RHSA-2026:90364Refaccess.redhat.com/errata/RHSA-2026:92221Refaccess.redhat.com/errata/RHSA-2026:92369Refaccess.redhat.com/security/cve/CVE-2026-96275Refbugzilla.redhat.com/show_bug.cgi?id=2539416GitHubgithub.com/flatpak/flatpak/security/advisories/GHSA-fqx6-vh4p-42cg

How CyberStrike helps

Frequently asked questions

What is CVE-2026-96275?

CVE-2026-96275 is a high-severity vulnerability. It was published on September 23, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

How severe is CVE-2026-96275?

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-2026-96275?

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-2026-96275?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-96275 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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