CVE-2026-7141: vLLM makes Use of Uninitialized Resource
A vulnerability was found in vLLM up to 0.19.0. The affected element is the function hasmambalayers of the file vllm/v1/kvcacheinterface.py of the component KV Block Handler. Performing a manipulation results in uninitialized resource. It is possible to initiate the attack remotely. The attack is considered to have high complexity. The exploitability is described as difficult.
Published Apr 27, 2026 · Updated May 6, 2026
Affected packages
vllm
- Ecosystem
- PyPI
- Affected
- < 0.19.1
- Fixed in
- 0.19.1
- Check
pip show vllm
Advisory details
From the GitHub Advisory Database (CC BY 4.0).
A vulnerability was found in vLLM up to 0.19.0. The affected element is the function has_mamba_layers of the file vllm/v1/kv_cache_interface.py of the component KV Block Handler. Performing a manipulation results in uninitialized resource. It is possible to initiate the attack remotely. The attack is considered to have high complexity. The exploitability is described as difficult. The exploit has been made public and could be used. The patch is named 1ad67864c0c20f167929e64c875f5c28e1aad9fd. To fix this issue, it is recommended to deploy a patch.
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-7141
- https://github.com/vllm-project/vllm/issues/39146
- https://github.com/vllm-project/vllm/issues/39146#issue-4215090365
- https://github.com/vllm-project/vllm/pull/39283
- https://github.com/AjAnubolu/vllm/commit/1ad67864c0c20f167929e64c875f5c28e1aad9fd
- https://vuldb.com/submit/801297
- https://vuldb.com/vuln/359740
- https://vuldb.com/vuln/359740/cti
- https://github.com/advisories/GHSA-x368-4g9h-fvv4
How this page is made: the data panel comes from the GitHub Advisory Database, CISA’s KEV catalog, the NVD and FIRST EPSS, and updates twice a day. No analysis has been written for this entry yet. Methodology
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