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CVE-2026-48991

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
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:c26463252516ffcb3a977019f6111356dfe79eafff858d495c9fb1339f4c26c8
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"XianYuLauncher","vendor":"XianYuLauncher","versions":[{"status":"affected","version":"< 1.5.5"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:063c2c661d867b8156ac3cb473e12bdcd088f2ceaa524ea2509306e400aa4b6a · sha256:0fb77b298ca97f43… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"NONE","baseScore":5.5,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:063c2c661d867b8156ac3cb473e12bdcd088f2ceaa524ea2509306e400aa4b6a · sha256:0fb77b298ca97f43… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-287","description":"CWE-287: Improper Authentication","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:063c2c661d867b8156ac3cb473e12bdcd088f2ceaa524ea2509306e400aa4b6a · sha256:0fb77b298ca97f43… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"name":"https://github.com/XianYuLauncher/XianYuLauncher/pull/213","tags":["x_refsource_MISC"],"url":"https://github.com/XianYuLauncher/XianYuLauncher/pull/213"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:063c2c661d867b8156ac3cb473e12bdcd088f2ceaa524ea2509306e400aa4b6a · sha256:0fb77b298ca97f43… · /containers/cna/references/1
{"name":"https://github.com/XianYuLauncher/XianYuLauncher/security/advisories/GHSA-q6r9-qxmf-8hfx","tags":["x_refsource_CONFIRM"],"url":"https://github.com/XianYuLauncher/XianYuLauncher/security/advisories/GHSA-q6r9-qxmf-8hfx"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:063c2c661d867b8156ac3cb473e12bdcd088f2ceaa524ea2509306e400aa4b6a · sha256:0fb77b298ca97f43… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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