{"cve":"CVE-2026-73558","nvd":{"published":"2026-08-13T15:20:18.220","modified":"2026-09-28T18:41:49.083","status":"Analyzed","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N","score":5.3},"cwes":["CWE-190"],"references":["https://github.com/vllm-project/vllm/commit/451227cb3ff07989698fed982c2d3e4300257924","https://github.com/vllm-project/vllm/issues/42860","https://github.com/vllm-project/vllm/pull/49660","https://github.com/vllm-project/vllm/releases/tag/v0.27.0","https://github.com/vllm-project/vllm/security/advisories/GHSA-7m6h-x95x-82q5"],"products":["vllm:vllm"],"source":"nvd","synced_at":"2026-10-19T22:48:17.459049833+00:00"},"epss":{"cve":"CVE-2026-73558","score":0.00414,"percentile":0.35695,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-7m6h-x95x-82q5","url":"https://osv.dev/vulnerability/GHSA-7m6h-x95x-82q5","summary":"vLLM: Cross-User Data Leak Vulnerability","modified":"2026-09-10T12:25:33.167762931Z","packages":[{"ecosystem":"PyPI","name":"vllm","purl":"pkg:pypi/vllm","ranges":["<0.27.0"],"fixed":["0.27.0"]}]},{"id":"PYSEC-2026-3935","url":"https://osv.dev/vulnerability/PYSEC-2026-3935","summary":"vLLM: Cross-User Data Leak Vulnerability","modified":"2026-09-10T12:15:15.569176600Z","packages":[{"ecosystem":"PyPI","name":"vllm","purl":"pkg:pypi/vllm","ranges":["<0.27.0"],"fixed":["0.27.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}