{"id":"CVE-2026-89032","state":"PUBLISHED","title":"BerriAI LiteLLM < 1.101.0-rc.1 Tenant Isolation Bypass via Semantic Cache Layer","description":"BerriAI LiteLLM before 1.101.0-rc.1 contains a tenant isolation bypass vulnerability in the semantic cache layer that allows authenticated users to read other tenants' cached responses by exploiting a metadata key mismatch between _get_semantic_cache_tenant_scope() and _get_metadata_variable_name(). Attackers holding a valid virtual key can submit semantically similar prompts on affected routes such as /v1/responses and /bedrock/* to retrieve cached responses containing other tenants' personally identifiable information, financial data, or source code, and can cause agentic front-ends to auto-execute attacker-supplied tool calls under victim credentials by returning cached function_call or tool_calls payloads to a different principal.","publishedAt":"2026-09-25T16:04:47.964Z","updatedAt":"2026-10-01T15:21:54.281Z","severity":{"score":8.7,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N","source":"VulnCheck"},"assigner":"VulnCheck","products":["BerriAI litellm"],"affected":[{"vendor":"BerriAI","product":"litellm","packageURL":"pkg:github/BerriAI/litellm","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"1.101.0-rc.1","versionType":"custom"}],"repo":"https://github.com/BerriAI/litellm"}],"references":["https://github.com/BerriAI/litellm/releases/tag/v1.101.0-rc.1","https://github.com/BerriAI/litellm/pull/39590","https://github.com/BerriAI/litellm/commit/16db51e2cfc28e02bd460481e634a8403ea9265e","https://www.vulncheck.com/advisories/berriai-litellm-rc-1-tenant-isolation-bypass-via-semantic-cache-layer"],"weaknesses":["CWE-863"],"ingestedAt":"2026-10-29T20:13:26.108Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/89xxx/CVE-2026-89032.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-89032","state":"PUBLISHED","datePublished":"2026-09-25T16:04:47.964Z","dateUpdated":"2026-10-01T15:21:54.281Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-09-10T16:23:54.472Z"},"containers":{"cna":{"title":"BerriAI LiteLLM < 1.101.0-rc.1 Tenant Isolation Bypass via Semantic Cache Layer","descriptions":[{"lang":"en","value":"BerriAI LiteLLM before 1.101.0-rc.1 contains a tenant isolation bypass vulnerability in the semantic cache layer that allows authenticated users to read other tenants' cached responses by exploiting a metadata key mismatch between _get_semantic_cache_tenant_scope() and _get_metadata_variable_name(). 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