Critical 9.3Published Feb 16, 2026

CVE-2026-26220LightLLM <= 1.1.0 PD Mode Unsafe Deserialization RCE

Updated under an hour ago (Oct 28, 2026, 1:00 AM ET)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for ModelTC LightLLM

Exploited in the last 30 days

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.

CVSS: 9.3 CRITICAL (v4.0, CNA)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
Weakness (CWE): CWE-502
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Deferred
Record last updated: Jul 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

ModelTC LightLLM modeltc:lightllm (from the name)	through 1.1.0	CNA record

References

References

https://chocapikk.com/posts/2026/lightllm-pickle-rce/	technical-description, exploit
https://github.com/ModelTC/LightLLM/issues/1213	issue-tracking
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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.