What is CVE-2026-42188?

CVE-2026-42188 is a low-severity vulnerability in Geysermc Geyser, classified under Server-Side Request Forgery (SSRF). CVSS score: 2.4/10. Published 2026-05-11.

How severe is CVE-2026-42188?

Low severity. CVSS v3 base score is 2.4 out of 10.

SSRF in Geysermc Geyser

CVE-2026-42188

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 B…

Vulnerability class: SSRF (Server-Side Request Forgery)

EPSS: 0.000 (7.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 2.4 (Low). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:N/A:N.

Affected products

Geysermc Geyser — versions < 2.9.3

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-42188?: CVE-2026-42188 is a low-severity vulnerability in Geysermc Geyser, classified under Server-Side Request Forgery (SSRF). CVSS score: 2.4/10. Published 2026-05-11.
How severe is CVE-2026-42188?: Low severity. CVSS v3 base score is 2.4 out of 10.