Geysermc vulnerabilities

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Published CVEs affecting Geysermc products: 1 record(s), with severity, exploitation and fixes.

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CVE-2026-42188 Medium · 4.3 CWE-918 May 11, 2026

Geyser: Server-Side Request Forgery (SSRF) via Player Head Texture URL

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.