Resource exhaustion in Modeltc Lightllm
CVE-2026-103042
LightLLM through 1.2.0 contains a memory exhaustion vulnerability in the NCCL control channel when started with --pd_trans_mode nccl, allowing unauthenticated attackers to exhaust KV-transfer worker memory. Attackers can call the exposed_set_value method to store unbounded key-value pairs without size limits, causing the worker process to crash and triggering node failure.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/ModelTC/LightLLM/issues/1595 (issue-tracking)
- github.com/ModelTC/lightllm/blob/v1.2.0/lightllm/server/router/model_infer/mode… (technical-description)
- github.com/ModelTC/lightllm/blob/v1.2.0/lightllm/server/router/model_infer/mode… (technical-description)
- github.com/ModelTC/lightllm/blob/v1.2.0/lightllm/server/router/model_infer/mode… (technical-description)
- github.com/ModelTC/LightLLM (product)
- www.vulncheck.com/advisories/lightllm-through-1.2.0-unauthenticated-memory-exha… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-103042?
- CVE-2026-103042 is a high-severity vulnerability in Modeltc Lightllm, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-09-29.
- How severe is CVE-2026-103042?
- High severity. CVSS v3 base score is 7.5 out of 10.