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CVE Vulnerability Details :
CVE-2026-26220
PUBLISHED
More InfoOfficial Page
Assigner-VulnCheck
Assigner Org ID-83251b91-4cc7-4094-a5c7-464a1b83ea10
View Known Exploited Vulnerability (KEV) details
Published At-17 Feb, 2026 | 01:52
Updated At-17 Feb, 2026 | 14:37
Rejected At-
▼CVE Numbering Authority (CNA)
LightLLM <= 1.1.0 PD Mode Unsafe Deserialization RCE

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.

Affected Products
Vendor
ModelTC
Product
LightLLM
Package Name
LightLLM
Repo
https://github.com/ModelTC/lightllm
Default Status
unknown
Versions
Affected
  • From 0 through 1.1.0 (semver)
Problem Types
TypeCWE IDDescription
CWECWE-502CWE-502 Deserialization of Untrusted Data
Type: CWE
CWE ID: CWE-502
Description: CWE-502 Deserialization of Untrusted Data
Metrics
VersionBase scoreBase severityVector
4.09.3CRITICAL
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
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
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
finder
Valentin Lobstein (Chocapikk)
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://chocapikk.com/posts/2026/lightllm-pickle-rce/
technical-description
exploit
https://github.com/ModelTC/LightLLM/issues/1213
issue-tracking
patch
https://lightllm-en.readthedocs.io/en/latest/index.html
product
https://github.com/ModelTC/lightllm/blob/a27dfc88c2144ed51a6e160b6fbe20aad66c8fe0/lightllm/server/api_http.py#L310
product
https://github.com/ModelTC/lightllm/blob/a27dfc88c2144ed51a6e160b6fbe20aad66c8fe0/lightllm/server/api_http.py#L331
product
https://www.vulncheck.com/advisories/lightllm-pd-mode-unsafe-deserialization-rce
third-party-advisory
Hyperlink: https://chocapikk.com/posts/2026/lightllm-pickle-rce/
Resource:
technical-description
exploit
Hyperlink: https://github.com/ModelTC/LightLLM/issues/1213
Resource:
issue-tracking
patch
Hyperlink: https://lightllm-en.readthedocs.io/en/latest/index.html
Resource:
product
Hyperlink: https://github.com/ModelTC/lightllm/blob/a27dfc88c2144ed51a6e160b6fbe20aad66c8fe0/lightllm/server/api_http.py#L310
Resource:
product
Hyperlink: https://github.com/ModelTC/lightllm/blob/a27dfc88c2144ed51a6e160b6fbe20aad66c8fe0/lightllm/server/api_http.py#L331
Resource:
product
Hyperlink: https://www.vulncheck.com/advisories/lightllm-pd-mode-unsafe-deserialization-rce
Resource:
third-party-advisory
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Details not found