CVE-2026-42188
2.4 · LOWOverview
CVE-2026-42188 is a low-severity vulnerability affecting geysermc geyser. 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 and patches from geysermc. Update geyser to the latest patched version. 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.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| geysermc | geyser | >= 0, < 2.9.3 | Affected |
Frequently Asked Questions
What is CVE-2026-42188?
CVE-2026-42188 is a low-severity vulnerability affecting geysermc geyser. 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 and patches from geysermc. Update geyser to the latest patched version. 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's AI-powered security agents can automatically detect CVE-2026-42188 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
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