{"id":"CVE-2026-73558","state":"PUBLISHED","title":"vLLM: Cross-User Data Leak Vulnerability","description":"vLLM is an inference and serving engine for large language models. Prior to 0.27.0, an integer overflow in blockIdx.x * 2 * d in activation_kernels.cu can cause act_and_mul_kernel to consume another batched user's input, allowing a request processed in the same inference batch to receive a partial or complete copy of another user's inference result. This issue is fixed in version 0.27.0.","publishedAt":"2026-08-13T15:06:06.584Z","updatedAt":"2026-08-13T15:38:40.181Z","severity":{"score":5.3,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["vllm-project vllm"],"affected":[{"vendor":"vllm-project","product":"vllm","versions":[{"version":"< 0.27.0","status":"affected"}]}],"references":["https://github.com/vllm-project/vllm/security/advisories/GHSA-7m6h-x95x-82q5","https://github.com/vllm-project/vllm/issues/42860","https://github.com/vllm-project/vllm/pull/49660","https://github.com/vllm-project/vllm/commit/451227cb3ff07989698fed982c2d3e4300257924","https://github.com/vllm-project/vllm/releases/tag/v0.27.0"],"weaknesses":["CWE-190"],"ingestedAt":"2026-10-29T20:12:58.252Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/73xxx/CVE-2026-73558.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-73558","state":"PUBLISHED","datePublished":"2026-08-13T15:06:06.584Z","dateUpdated":"2026-08-13T15:38:40.181Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-08-12T20:53:46.380Z"},"containers":{"cna":{"title":"vLLM: Cross-User Data Leak Vulnerability","descriptions":[{"lang":"en","value":"vLLM is an inference and serving engine for large language models. Prior to 0.27.0, an integer overflow in blockIdx.x * 2 * d in activation_kernels.cu can cause act_and_mul_kernel to consume another batched user's input, allowing a request processed in the same inference batch to receive a partial or complete copy of another user's inference result. This issue is fixed in version 0.27.0."}],"affected":[{"vendor":"vllm-project","product":"vllm","versions":[{"version":"< 0.27.0","status":"affected"}]}],"references":[{"url":"https://github.com/vllm-project/vllm/security/advisories/GHSA-7m6h-x95x-82q5","name":"https://github.com/vllm-project/vllm/security/advisories/GHSA-7m6h-x95x-82q5","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/vllm-project/vllm/issues/42860","name":"https://github.com/vllm-project/vllm/issues/42860","tags":["x_refsource_MISC"]},{"url":"https://github.com/vllm-project/vllm/pull/49660","name":"https://github.com/vllm-project/vllm/pull/49660","tags":["x_refsource_MISC"]},{"url":"https://github.com/vllm-project/vllm/commit/451227cb3ff07989698fed982c2d3e4300257924","name":"https://github.com/vllm-project/vllm/commit/451227cb3ff07989698fed982c2d3e4300257924","tags":["x_refsource_MISC"]},{"url":"https://github.com/vllm-project/vllm/releases/tag/v0.27.0","name":"https://github.com/vllm-project/vllm/releases/tag/v0.27.0","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-190","lang":"en","description":"CWE-190: Integer Overflow or Wraparound","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-08-13T15:06:06.584Z"},"source":{"advisory":"GHSA-7m6h-x95x-82q5","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/vllm-project/vllm/security/advisories/GHSA-7m6h-x95x-82q5","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-13T15:38:18.767062Z","id":"CVE-2026-73558","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":"2026-08-13T15:38:40.181Z"}}]}}}