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CVE-2026-42188

2.4 · LOW

Geyser is a bridge between Minecraft: Bedrock Edition and Minecraft: Java Edition.

Published May 11, 2026CWE-918EPSS 0.28%

Overview

CVE-2026-42188 is a low-severity vulnerability. It was published on May 11, 2026 and has a CVSS 3.1 base score of 2.4 (LOW).

This vulnerability has a CVSS 3.1 base score of 2.4, rated LOW. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

Geyser is a bridge between Minecraft: Bedrock Edition and Minecraft: Java Edition. Prior to 2.9.3, a server-side request forgery (SSRF) vulnerability exists in Geyser’s handling of Bedrock player head texture data. By supplying a crafted Base64-encoded skin texture URL via the /give command, an attacker can cause the Minecraft server to issue arbitrary HTTP GET requests to attacker-controlled or internal endpoints. This occurs server-side, without proper URL validation, and can be triggered by a Bedrock client. This vulnerability is fixed in 2.9.3.

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/GeyserMC/Geyser/security/advisories/GHSA-xcfg-fcr5-gw9rGitHubgithub.com/GeyserMC/Geyser/security/advisories/GHSA-xcfg-fcr5-gw9r

How CyberStrike helps

Frequently asked questions

What is CVE-2026-42188?

CVE-2026-42188 is a low-severity vulnerability. It was published on May 11, 2026 and has a CVSS 3.1 base score of 2.4 (LOW).

How severe is CVE-2026-42188?

This vulnerability has a CVSS 3.1 base score of 2.4, rated LOW. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-42188?

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-2026-42188?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-42188 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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