CVE-2026-42188 – Geyser: Server-Side Request Forgery (SSRF) via Player Head Texture URL

CVE ID :CVE-2026-42188

Published : May 11, 2026, 9:25 p.m. | 36 minutes ago

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.

Severity: 0.0 | NA

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