by Kastro
Paper/Archive/CVE-2026-90919

CVE-2026-90919

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

EPSS 1%public exploitCVSS 9.8
critical.is priorityof 100
53
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 65.3.653 × 2013.1Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
LightLLM≤ 1.2.0–CNA

Scores by source

VulnCheck (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
VulnCheck (CNA)9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CISA ADPSSVCExploitation: poc · Automatable: yes · Technical impact: total

References

exploitgithub.com/ModelTC/LightLLM/issues/1563writeupgithub.com/ModelTC/LightLLM/blob/v1.2.0/lightllm/server/config_server/api_http.py#L79-L86refgithub.com/ModelTC/lightllmwriteupvulncheck.com/advisories/lightllm-through-1.2.0-unauthenticated-remote-code-execution-via-config-server-pickle-deserialization