CVE-2026-103270

HIGH 7.5

LightLLM through 1.2.0 Missing Authentication on RL Control Routes

CVSS Score

7.5

EPSS Score

0.0%

EPSS Percentile

0th

LightLLM through 1.2.0 mounts reinforcement learning control routes on the public HTTP API without authentication checks. Unauthenticated attackers can call endpoints like /pause_generation, /abort_request, /flush_cache, and /init_weights_update_group to disrupt inference operations and wedge workers on deployments started with --enable_rl.

CWE	CWE-306
Vendor	modeltc
Product	lightllm
Published	Sep 30, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Affected Versions

ModelTC / LightLLM

0 ≤ 1.2.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/ModelTC/LightLLM/issues/1609 github.com: https://github.com/ModelTC/lightllm/blob/v1.2.0/lightllm/server/api_http.py#L505-L507 github.com: https://github.com/ModelTC/lightllm/blob/v1.2.0/lightllm/server/api_http_rl.py#L51-L139 github.com: https://github.com/ModelTC/LightLLM vulncheck.com: https://www.vulncheck.com/advisories/lightllm-through-1.2.0-missing-authentication-on-rl-control-routes

Credits

Mingkai Yu Jiajia Liu