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CVE-2026-48991 XianYuLauncher: Legacy Microsoft account OAuth sign-in flow lacks PKCE and state validation

🗓️ 17 Jun 2026 21:32:41Reported by GitHub_MType 
cvelist
 cvelist
🔗 www.cve.org👁 4 Views

Legacy Microsoft login flow in XianYuLauncher before 1.5.5 exposes authentication artifacts due to missing code challenge and state verification.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
CVE
CVE-2026-48991
17 Jun 202621:32
cve
EUVD
EUVD-2026-37808
17 Jun 202621:32
euvd
NVD
CVE-2026-48991
17 Jun 202622:16
nvd
Positive Technologies
PT-2026-50552
17 Jun 202600:00
ptsecurity
[
  {
    "vendor": "XianYuLauncher",
    "product": "XianYuLauncher",
    "versions": [
      {
        "version": "< 1.5.5",
        "status": "affected"
      }
    ]
  }
]

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