MEDIUM

CVE-2026-48991

2026-06-17 CVSS v3.1

CVSS

5.5

Description

XianYuLauncher is a Minecraft Java Edition launcher. In versions prior to 1.5.5, sensitive authentication artifacts could be exposed during a user-initiated login under certain local attack conditions. Affected versions relied on a fixed localhost redirect URI without PKCE or state validation. Exploitation is most likely to occur when an attacker is able to observe, intercept, or otherwise interfere with the local authentication flow on the same device. This issue has been fixed in version 1.5.5.

Weakness (CWE)

CWE-287 Improper Authentication

EPSS Score

0.13%

Probability of exploitation in next 30 days

2.7th percentile

References

https://github.com/XianYuLauncher/XianYuLauncher/pull/213 https://github.com/XianYuLauncher/XianYuLauncher/security/advisories/GHSA-q6r9-qxmf-8hfx

View on dbcve.org

Base CVE data derived from NVD (public domain). Enrichment by dbcve.org (CC-BY-4.0). Fetched via API.

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