CVE-2026-42188

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.

CVSS v3 2.4 LOW

2.4^/10

CVSS v3 : LOW

Vector :

Exploitability : 0.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/GeyserMC/Geyser/security/advisories/GHSA-xcfg-fcr5-gw9r	Exploit Vendor Advisory
https://github.com/GeyserMC/Geyser/security/advisories/GHSA-xcfg-fcr5-gw9r	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:geysermc:geyser:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-05-11 22:22

Updated : 2026-08-25 17:01

NVD link : CVE-2026-42188

Mitre link : CVE-2026-42188

CVE.ORG link : CVE-2026-42188

JSON object : View

Products Affected

geysermc

geyser

CWE

CWE-918

Server-Side Request Forgery (SSRF)

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