CVE-2026-73558vLLM: Cross-User Data Leak Vulnerability
Updated under an hour ago ()
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It affects vllm-project vllm and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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Free account, 1 product
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
- 5.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
- Weakness (CWE)
- CWE-190
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Analyzed
- Record last updated
- Aug 13, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
vllm-project vllm vllm_project:vllm (from the name) | before 0.27.0 | CNA record |
vllm vllm vllm:vllm | before 0.27.0 | NVD |
References
- https://github.com/vllm-project/vllm/security/advisories/GHSA-7m6h-x95x-82q5x-refsource-confirm, exploit, vendor-advisory
- https://github.com/vllm-project/vllm/issues/42860x-refsource-misc, issue-tracking, patch
- https://github.com/vllm-project/vllm/pull/49660x-refsource-misc, issue-tracking, patch
- https://github.com/vllm-project/vllm/commit/451227cb3ff07989698fed982c2d3e4300257924x-refsource-misc, patch
- https://github.com/vllm-project/vllm/releases/tag/v0.27.0x-refsource-misc, release-notes
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.