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NVD Vulnerability Details :
CVE-2026-26220
Awaiting Analysis
More InfoOfficial Page
Source-disclosure@vulncheck.com
View Known Exploited Vulnerability (KEV) details
Published At-17 Feb, 2026 | 03:16
Updated At-18 Feb, 2026 | 17:52

LightLLM version 1.1.0 and prior contain an unauthenticated remote code execution vulnerability in PD (prefill-decode) disaggregation mode. The PD master node exposes WebSocket endpoints that receive binary frames and pass the data directly to pickle.loads() without authentication or validation. A remote attacker who can reach the PD master can send a crafted payload to achieve arbitrary code execution.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary4.09.3CRITICAL
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
Type: Secondary
Version: 4.0
Base score: 9.3
Base severity: CRITICAL
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/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
CPE Matches
Weaknesses
CWE IDTypeSource
CWE-502Primarydisclosure@vulncheck.com
CWE ID: CWE-502
Type: Primary
Source: disclosure@vulncheck.com
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://chocapikk.com/posts/2026/lightllm-pickle-rce/disclosure@vulncheck.com
N/A
https://github.com/ModelTC/LightLLM/issues/1213disclosure@vulncheck.com
N/A
https://github.com/ModelTC/lightllm/blob/a27dfc88c2144ed51a6e160b6fbe20aad66c8fe0/lightllm/server/api_http.py#L310disclosure@vulncheck.com
N/A
https://github.com/ModelTC/lightllm/blob/a27dfc88c2144ed51a6e160b6fbe20aad66c8fe0/lightllm/server/api_http.py#L331disclosure@vulncheck.com
N/A
https://lightllm-en.readthedocs.io/en/latest/index.htmldisclosure@vulncheck.com
N/A
https://www.vulncheck.com/advisories/lightllm-pd-mode-unsafe-deserialization-rcedisclosure@vulncheck.com
N/A
Hyperlink: https://chocapikk.com/posts/2026/lightllm-pickle-rce/
Source: disclosure@vulncheck.com
Resource: N/A
Hyperlink: https://github.com/ModelTC/LightLLM/issues/1213
Source: disclosure@vulncheck.com
Resource: N/A
Hyperlink: https://github.com/ModelTC/lightllm/blob/a27dfc88c2144ed51a6e160b6fbe20aad66c8fe0/lightllm/server/api_http.py#L310
Source: disclosure@vulncheck.com
Resource: N/A
Hyperlink: https://github.com/ModelTC/lightllm/blob/a27dfc88c2144ed51a6e160b6fbe20aad66c8fe0/lightllm/server/api_http.py#L331
Source: disclosure@vulncheck.com
Resource: N/A
Hyperlink: https://lightllm-en.readthedocs.io/en/latest/index.html
Source: disclosure@vulncheck.com
Resource: N/A
Hyperlink: https://www.vulncheck.com/advisories/lightllm-pd-mode-unsafe-deserialization-rce
Source: disclosure@vulncheck.com
Resource: N/A
Change History
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