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CVE-2026-103905

7.5 · HIGH

The authentication middleware of the JTL-Shop administration backend processes the plugin safe mode toggle on the admin logout route before checking whether the requesting user is authenticated.

Published Oct 14, 2026CWE-306EPSS 0.53%

Overview

CVE-2026-103905 is a high-severity vulnerability. It was published on October 14, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

The authentication middleware of the JTL-Shop

administration backend processes the plugin safe mode toggle on the admin

logout route before checking whether the requesting user is

authenticated. An unauthenticated remote attacker can therefore switch the shop's

plugin safe mode on and off, which deactivates all installed plugins and their

functionality, such as payment and shipping integrations, resulting in a shop-wide

denial of service. The attack requires a single request and can be

automated against many installations.

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

Refwww.jtl-software.com/de/security/shop-maintenance-mode

How CyberStrike helps

Frequently asked questions

What is CVE-2026-103905?

CVE-2026-103905 is a high-severity vulnerability. It was published on October 14, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-103905?

This vulnerability has a CVSS 3.1 base score of 7.5, 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-2026-103905?

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-2026-103905?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-103905 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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