{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-102895","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-09-29T17:34:42.743Z","datePublished":"2026-11-04T21:16:59.842Z","dateUpdated":"2026-11-04T21:16:59.842Z"},"containers":{"cna":{"title":"GPUStack: Authentication bypass via trusted loopback source (reverse-proxy TCP peer or X-GPUStack-Real-IP header) grants unauthenticated admin","problemTypes":[{"descriptions":[{"cweId":"CWE-287","lang":"en","description":"CWE-287: Improper Authentication","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-290","lang":"en","description":"CWE-290: Authentication Bypass by Spoofing","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-346","lang":"en","description":"CWE-346: Origin Validation Error","type":"CWE"}]}],"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"}}],"references":[{"name":"https://github.com/gpustack/gpustack/security/advisories/GHSA-gj9m-f8ph-pmhr","tags":["x_refsource_CONFIRM"],"url":"https://github.com/gpustack/gpustack/security/advisories/GHSA-gj9m-f8ph-pmhr"},{"name":"https://github.com/gpustack/gpustack/pull/5346","tags":["x_refsource_MISC"],"url":"https://github.com/gpustack/gpustack/pull/5346"},{"name":"https://github.com/gpustack/gpustack/commit/53f42a6a553542974396d16a4ff6b12bcbedb48d","tags":["x_refsource_MISC"],"url":"https://github.com/gpustack/gpustack/commit/53f42a6a553542974396d16a4ff6b12bcbedb48d"},{"name":"https://github.com/gpustack/gpustack/releases/tag/v2.2.0","tags":["x_refsource_MISC"],"url":"https://github.com/gpustack/gpustack/releases/tag/v2.2.0"}],"affected":[{"vendor":"gpustack","product":"gpustack","versions":[{"version":"< 2.2.0","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-11-04T21:16:59.842Z"},"descriptions":[{"lang":"en","value":"GPUStack is an open-source GPU cluster manager for AI model serving and GPU instance provisioning. Prior to 2.2.0, get_current_user in gpustack/api/auth.py treated a loopback request source as the built-in administrator when force_auth_localhost was false, which was the default. A remote request could appear to originate from 127.0.0.1 because client_ip_getter accepted a same-host reverse proxy peer or a client-supplied X-GPUStack-Real-IP loopback value. The bypass allowed unauthenticated administrative access, including user and model changes, persistent administrator API-key creation, disclosure of worker and cloud-provider secrets, and code execution through POST /v2/inference-backends/from-yaml. Exploitation was observed in the wild against a 2.1.1 deployment. This issue is fixed in version 2.2.0."}],"source":{"advisory":"GHSA-gj9m-f8ph-pmhr","discovery":"UNKNOWN"}}}}