{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-34460","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-03-27T18:18:14.896Z","datePublished":"2026-06-02T15:29:14.648Z","dateUpdated":"2026-06-02T17:35:29.044Z"},"containers":{"cna":{"title":"NamelessMC: OAuth callback `state` is not validated, allowing login CSRF / session swapping","problemTypes":[{"descriptions":[{"cweId":"CWE-302","lang":"en","description":"CWE-302: Authentication Bypass by Assumed-Immutable Data","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-346","lang":"en","description":"CWE-346: Origin Validation Error","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-352","lang":"en","description":"CWE-352: Cross-Site Request Forgery (CSRF)","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.4,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/NamelessMC/Nameless/security/advisories/GHSA-pmpw-2xvh-5xj6","tags":["x_refsource_CONFIRM"],"url":"https://github.com/NamelessMC/Nameless/security/advisories/GHSA-pmpw-2xvh-5xj6"}],"affected":[{"vendor":"NamelessMC","product":"Nameless","versions":[{"version":"< 2.2.5","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-06-02T15:29:14.648Z"},"descriptions":[{"lang":"en","value":"NamelessMC is website software for Minecraft servers. In versions 2.2.4 and prior, the OAuth callback handling does not validate the state parameter server-side before exchanging the authorization code. This allows an attacker to capture a valid OAuth callback URL for their own account and cause a victim's browser to navigate to it, resulting in the victim's session being authenticated as the attacker-linked account (OAuth login CSRF / session swapping). This is patched in version 2.2.5."}],"source":{"advisory":"GHSA-pmpw-2xvh-5xj6","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/NamelessMC/Nameless/security/advisories/GHSA-pmpw-2xvh-5xj6","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-02T17:35:06.384367Z","id":"CVE-2026-34460","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-06-02T17:35:29.044Z"}}]}}