CVE-2026-90919Network attack vectorHinoki check available

Unauthenticated code execution via unsafe pickle deserialization

Published Sep 14, 2026 · Updated Sep 14, 2026

Unsafe deserialization in ModelTC LightLLM through 1.2.0 allows remote attackers to execute arbitrary code through the Config Server. The /visual_register WebSocket handler in lightllm/server/config_server/api_http.py accepts a connection and passes its first binary frame directly to pickle.loads() without authentication or validation. Any attacker able to reach the Config Server port can run code with the Config Server process privileges, while deployments that do not expose this optional mode are not reachable.

CVSS severityUnavailable
Unscored
EPSS probability1.01%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Unsafe deserialization in ModelTC LightLLM through 1.2.0 allows remote attackers to execute arbitrary code through the Config Server. The /visual_register WebSocket handler in lightllm/server/config_server/api_http.py accepts a connection and passes its first binary frame directly to pickle.loads() without authentication or validation. Any attacker able to reach the Config Server port can run code with the Config Server process privileges, while deployments that do not expose this optional mode are not reachable.

The record

CVE
CVE-2026-90919
Published
Sep 14, 2026
Updated
Sep 14, 2026
Vendor
ModelTC
Product
LightLLM
Classifications
T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 14, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=1.2.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ModelTC · LightLLMversion=0 <=1.2.0

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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