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Vulnerability record · public intelligence
CVE-2026-26220
CRITICAL

LightLLM <= 1.1.0 PD Mode Unsafe Deserialization RCE

Published Feb 17, 2026 · Updated Nov 3, 2026

Severity · CVSSCRITICAL · Not scored
Known exploitationNot listed
EPSS / likelihood0.96%
QFinch risk scoreNot available

Original summary

Normalized public record · Updated Nov 3, 2026

LightLLM <= 1.1.0 PD Mode Unsafe Deserialization RCE

Publisher and source text is retained separately from QFinch interpretation.

QFinch assessment

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.

Evidence: public source records

Affected products

Affected scope reported by the available public evidence
Affected package, product or rangeFix status
Consult the referenced vendor advisory for affected versions.Consult source advisory

Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.

Remediation

Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.

  1. Confirm the affected product and reachable code path exist in your environment.
  2. Apply the vendor-supported patch or mitigation from the primary advisory.
  3. Rescan the exact deployed revision and retain verification evidence.
Review primary references

Evidence coverage

FIRST-EPSSCVE-LIST-V5
SSVC priority
LOW
Confidence
Not available
Aliases
None reported

Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.

Sources and record history

  1. chocapikk.com ↗
  2. Source repository ↗
  3. lightllm-en.readthedocs.io ↗
  4. Source repository ↗
  5. Source repository ↗
  6. www.vulncheck.com ↗

Record history

Published Feb 17, 2026 · Last refreshed Nov 3, 2026

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