{"id":"CVE-2026-34460","state":"PUBLISHED","title":"NamelessMC: OAuth callback `state` is not validated, allowing login CSRF / session swapping","description":"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.","publishedAt":"2026-06-02T15:29:14.648Z","updatedAt":"2026-06-02T17:35:29.044Z","severity":{"score":5.4,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["NamelessMC Nameless"],"affected":[{"vendor":"NamelessMC","product":"Nameless","versions":[{"version":"< 2.2.5","status":"affected"}]}],"references":["https://github.com/NamelessMC/Nameless/security/advisories/GHSA-pmpw-2xvh-5xj6"],"weaknesses":["CWE-302","CWE-346","CWE-352"],"ingestedAt":"2026-10-29T20:11:40.391Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/34xxx/CVE-2026-34460.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-34460","state":"PUBLISHED","datePublished":"2026-06-02T15:29:14.648Z","dateUpdated":"2026-06-02T17:35:29.044Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-03-27T18:18:14.896Z"},"containers":{"cna":{"title":"NamelessMC: OAuth callback `state` is not validated, allowing login CSRF / session swapping","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."}],"affected":[{"vendor":"NamelessMC","product":"Nameless","versions":[{"version":"< 2.2.5","status":"affected"}]}],"references":[{"url":"https://github.com/NamelessMC/Nameless/security/advisories/GHSA-pmpw-2xvh-5xj6","name":"https://github.com/NamelessMC/Nameless/security/advisories/GHSA-pmpw-2xvh-5xj6","tags":["x_refsource_CONFIRM"]}],"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"}}],"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"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-06-02T15:29:14.648Z"},"source":{"advisory":"GHSA-pmpw-2xvh-5xj6","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","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"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-06-02T17:35:29.044Z"}}]}}}