CVE-2026-42188
Geyser: Server-Side Request Forgery (SSRF) via Player Head Texture URL
MEDIUM 4.3EPSS 0.3%
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
- GeyserMC · Geyser
- CVSS v3.1 NVD
- 4.3 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N - CVSS v3.1 GITHUB
- 2.4 LOW
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:N/A:N - EPSS
- 0.28% chance of exploitation in the next 30 days, 19th percentile
- Published
- 2026-05-11
- Updated
- 2026-05-13