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High severity · published Sep 30, 2026
CVE-2026-103270
LightLLM through 1.2.0 Missing Authentication on RL Control Routes
7.5
CVSS
0.5%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 44% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
LightLLM · ModelTC
through 1.2.0 · source: vendor
Affected product
LI
LightLLM
ModelTC
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-103270
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-103270
issue-tracking
https://github.com/ModelTC/LightLLM/issues/1609
technical-description
https://github.com/ModelTC/lightllm/blob/v1.2.0/lightllm/server/api_http.py#L505-L507
technical-description
https://github.com/ModelTC/lightllm/blob/v1.2.0/lightllm/server/api_http_rl.py#L51-L139
product
https://github.com/ModelTC/LightLLM
third-party-advisory
https://www.vulncheck.com/advisories/lightllm-through-1.2.0-missing-authentication-on-rl-control-routes
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