low2.4
CVE-2026-42188
Geyser Vulnerable to Server-Side Request Forgery (SSRF) via Player Head Texture URL in Geyser
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| maven | org.geysermc.geyser:core | <= 2.9.2 | 2.9.3 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Geysermc | Geyser | before 2.9.3 |