CVEvulnerability

CVE-2026-42188

4.3 MEDIUM Published 2026-05-11 Modified 2026-10-26 Official page ↗
Status
Analyzed
Published
2026-05-11
Last modified
2026-10-26
Assigner
[email protected]
CVSS 3.1 ([email protected])
2.4 LOW — CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:N/A:N
CVSS 3.1 ([email protected])
4.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
Weaknesses
CWE-918

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.

Affected configurations

• geysermc geyser (< 2.9.3)

Related

Weakness · CWE (1)

  • CWE-918 Server-Side Request Forgery weakness

References