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CVE-2026-30934

8.9 · HIGH

FileBrowser Quantum is a free, self-hosted, web-based file manager.

Published Mar 10, 2026CWE-79EPSS 0.38%

Overview

CVE-2026-30934 is a high-severity vulnerability. It was published on March 10, 2026 and has a CVSS 3.1 base score of 8.9 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.9, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

FileBrowser Quantum is a free, self-hosted, web-based file manager. Prior to 1.3.1-beta and 1.2.2-stable, Stored XSS is possible via share metadata fields (e.g., title, description) that are rendered into HTML for /public/share/<hash> without context-aware escaping. The server uses text/template instead of html/template, allowing injected scripts to execute when victims visit the share URL. This vulnerability is fixed in 1.3.1-beta and 1.2.2-stable.

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

GitHubgithub.com/gtsteffaniak/filebrowser/releases/tag/v1.2.2-stableGitHubgithub.com/gtsteffaniak/filebrowser/releases/tag/v1.3.1-betaGitHubgithub.com/gtsteffaniak/filebrowser/security/advisories/GHSA-r633-fcgp-m532

How CyberStrike helps

Frequently asked questions

What is CVE-2026-30934?

CVE-2026-30934 is a high-severity vulnerability. It was published on March 10, 2026 and has a CVSS 3.1 base score of 8.9 (HIGH).

How severe is CVE-2026-30934?

This vulnerability has a CVSS 3.1 base score of 8.9, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-30934?

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-2026-30934?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-30934 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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