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CVE-2026-91966

5.8 · MEDIUM

AVideo through 29.0 contains an unauthenticated server-side request forgery vulnerability in the check_site_availability function that accepts attacker-controlled HTTP Host headers.

Published Sep 15, 2026CWE-918EPSS 0.40%

Overview

CVE-2026-91966 is a medium-severity vulnerability. It was published on September 15, 2026 and has a CVSS 3.1 base score of 5.8 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.8, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

AVideo through 29.0 contains an unauthenticated server-side request forgery vulnerability in the check_site_availability function that accepts attacker-controlled HTTP Host headers. Attackers can send requests to submitIndex.php or ajax.php with arbitrary Host headers to probe internal network hosts and ports, following redirects without authentication.

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/WWBN/AVideo/security/advisories/GHSA-rqg6-qcjv-55w5Refwww.vulncheck.com/advisories/avideo-through-29.0-unauthenticated-ssrf-via-host-header

How CyberStrike helps

Frequently asked questions

What is CVE-2026-91966?

CVE-2026-91966 is a medium-severity vulnerability. It was published on September 15, 2026 and has a CVSS 3.1 base score of 5.8 (MEDIUM).

How severe is CVE-2026-91966?

This vulnerability has a CVSS 3.1 base score of 5.8, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-91966?

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-2026-91966?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-91966 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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