{"id":"CVE-2026-21854","state":"PUBLISHED","title":"Tarkov Data Manager Authentication Bypass vulnerability","description":"The Tarkov Data Manager is a tool to manage the Tarkov item data. Prior to 02 January 2025, an authentication bypass vulnerability in the login endpoint allows any unauthenticated user to gain full admin access to the Tarkov Data Manager admin panel by exploiting a JavaScript prototype property access vulnerability, combined with loose equality type coercion. A series of fix commits on 02 January 2025 fixed this and other vulnerabilities.","publishedAt":"2026-01-07T18:14:59.375Z","updatedAt":"2026-01-07T18:41:47.562Z","severity":{"score":9.8,"label":"Critical","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["the-hideout tarkov-data-manager"],"affected":[{"vendor":"the-hideout","product":"tarkov-data-manager","versions":[{"version":"<= 2.0.0","status":"affected"}]}],"references":["https://github.com/the-hideout/tarkov-data-manager/security/advisories/GHSA-r8w6-9xwg-6h73","https://github.com/the-hideout/tarkov-data-manager/commit/f188f0abf766cefe3f1b7b4fc6fe9dad3736174a"],"weaknesses":["CWE-287","CWE-843","CWE-1321"],"ingestedAt":"2026-10-29T20:11:10.572Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/21xxx/CVE-2026-21854.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-21854","state":"PUBLISHED","datePublished":"2026-01-07T18:14:59.375Z","dateUpdated":"2026-01-07T18:41:47.562Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-01-05T16:44:16.366Z"},"containers":{"cna":{"title":"Tarkov Data Manager Authentication Bypass vulnerability","descriptions":[{"lang":"en","value":"The Tarkov Data Manager is a tool to manage the Tarkov item data. Prior to 02 January 2025, an authentication bypass vulnerability in the login endpoint allows any unauthenticated user to gain full admin access to the Tarkov Data Manager admin panel by exploiting a JavaScript prototype property access vulnerability, combined with loose equality type coercion. A series of fix commits on 02 January 2025 fixed this and other vulnerabilities."}],"affected":[{"vendor":"the-hideout","product":"tarkov-data-manager","versions":[{"version":"<= 2.0.0","status":"affected"}]}],"references":[{"url":"https://github.com/the-hideout/tarkov-data-manager/security/advisories/GHSA-r8w6-9xwg-6h73","name":"https://github.com/the-hideout/tarkov-data-manager/security/advisories/GHSA-r8w6-9xwg-6h73","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/the-hideout/tarkov-data-manager/commit/f188f0abf766cefe3f1b7b4fc6fe9dad3736174a","name":"https://github.com/the-hideout/tarkov-data-manager/commit/f188f0abf766cefe3f1b7b4fc6fe9dad3736174a","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":9.8,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-287","lang":"en","description":"CWE-287: Improper Authentication","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-843","lang":"en","description":"CWE-843: Access of Resource Using Incompatible Type ('Type Confusion')","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-1321","lang":"en","description":"CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-01-07T18:14:59.375Z"},"source":{"advisory":"GHSA-r8w6-9xwg-6h73","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-01-07T18:40:33.171789Z","id":"CVE-2026-21854","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-01-07T18:41:47.562Z"}}]}}}