CVE-2026-90919 PUBLISHED

LightLLM through 1.2.0 Unauthenticated Remote Code Execution via Config Server Pickle Deserialization

Assigner: VulnCheck
Reserved: 14.09.2026 Published: 14.09.2026 Updated: 14.09.2026

LightLLM through 1.2.0 contains a remote code execution vulnerability in the Config Server's unauthenticated /visual_register WebSocket endpoint that passes the first client frame directly to pickle.loads(). Attackers can reach the Config Server port and send a malicious serialized payload with a reduce method to execute arbitrary code with Config Server process privileges.

CVSS Vector: 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
CVSS Score: 9.3

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS Score: 9.8

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	None	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	ModelTC
Product	LightLLM
Versions	Default: unaffected affected from 0 to 1.2.0 (incl.)

CVE-2026-90919 PUBLISHED

LightLLM through 1.2.0 Unauthenticated Remote Code Execution via Config Server Pickle Deserialization

Metrics

Product Status

Credits

References

Problem Types