CVE-2026-103042: Allocation of Resources Without Limits or Throttling in ModelTC LightLLM
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.
AI Analysis
Technical Summary
CVE-2026-103042 describes a memory exhaustion vulnerability in ModelTC's LightLLM product up to version 1.2.0. When LightLLM is started with the --pd_trans_mode nccl option, unauthenticated attackers can exploit the exposed_set_value method to store unbounded key-value pairs without size limits. This leads to exhaustion of the KV-transfer worker memory, causing the worker process to crash and resulting in node failure.
Potential Impact
The vulnerability allows unauthenticated remote attackers to cause denial of service by exhausting memory resources of the KV-transfer worker process. This leads to worker crashes and node failures, potentially disrupting service availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.
CVE-2026-103042: Allocation of Resources Without Limits or Throttling in ModelTC LightLLM
Description
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.
CVSS v4.0
Score 8.7high
Affected software
ModelTC
LightLLM
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-103042 describes a memory exhaustion vulnerability in ModelTC's LightLLM product up to version 1.2.0. When LightLLM is started with the --pd_trans_mode nccl option, unauthenticated attackers can exploit the exposed_set_value method to store unbounded key-value pairs without size limits. This leads to exhaustion of the KV-transfer worker memory, causing the worker process to crash and resulting in node failure.
Potential Impact
The vulnerability allows unauthenticated remote attackers to cause denial of service by exhausting memory resources of the KV-transfer worker process. This leads to worker crashes and node failures, potentially disrupting service availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-09-29T22:17:06.624Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6abc4489680226ef6869e5b8
Added to database: 09/29/2026, 23:06:49 UTC
Last enriched: 09/29/2026, 23:21:17 UTC
Last updated: 09/30/2026, 03:03:19 UTC
Views: 10
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