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CVE

CVE-2026-93839

LightLLM through 1.2.0 Missing Authentication in PD Master /pd_register WebSocket Endpoint
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CVE

CVE-2026-93839

LightLLM through 1.2.0 Missing Authentication in PD Master /pd_register WebSocket Endpoint

LightLLM through 1.2.0 contains an authentication bypass vulnerability in the /pd_register WebSocket endpoint that allows unauthenticated attackers to register arbitrary nodes by supplying crafted JSON without peer address validation. Attackers can disclose full user prompts routed to their socket, trigger denial of service by replacing legitimate nodes, or make the PD Master issue requests to internal network addresses.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.3
-
4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
C
H
U
0
-
C
H
U
-

Related Resources

No items found.

References

https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93839.json, https://nvd.nist.gov/vuln/detail/CVE-2026-93839, https://www.vulncheck.com/advisories/lightllm-through-1.2.0-missing-authentication-in-pd-master-pd-register-websocket-endpoint, https://github.com/ModelTC/LightLLM/issues/1576, https://github.com/ModelTC/LightLLM, https://github.com/ModelTC/lightllm, https://github.com/ModelTC/lightllm/blob/v1.2.0/lightllm/server/apihttp.py#L198-L205, https://github.com/ModelTC/lightllm/blob/v1.2.0/lightllm/server/apihttppd.py#L26-L36, https://github.com/ModelTC/lightllm/blob/v1.2.0/lightllm/server/httpserverforpdmaster/manager.py#L691-L698, https://github.com/ModelTC/lightllm/blob/v1.2.0/lightllm/server/httpserverforpd_master/manager.py#L714-L749

Severity

0

CVSS Score
0
10

Basic Information

Base CVSS
0
EPSS Probability
0.00761%
EPSS Percentile
0.5451%
Introduced Version
0
Fix Available

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