ModelTC LightLLM up to 1.1.0 WebSocket Endpoint pickle.loads deserialization

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.3$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in ModelTC LightLLM up to 1.1.0. This vulnerability affects the function pickle.loads of the component WebSocket Endpoint. Executing a manipulation can lead to deserialization. This vulnerability appears as CVE-2026-26220. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability was found in ModelTC LightLLM up to 1.1.0. It has been declared as critical. This vulnerability affects the function pickle.loads of the component WebSocket Endpoint. The manipulation with an unknown input leads to a deserialization vulnerability. The CWE definition for the vulnerability is CWE-502. The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The weakness was presented by Valentin Lobstein. The advisory is shared for download at chocapikk.com. This vulnerability was named CVE-2026-26220 since 02/11/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 02/20/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.3

VulDB Base Score: 7.3
VulDB Temp Score: 7.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Deserialization
CWE: CWE-502 / CWE-20
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

02/11/2026 CVE reserved
02/17/2026 +6 days Advisory disclosed
02/17/2026 +0 days VulDB entry created
02/20/2026 +3 days VulDB entry last update

Sourcesinfo

Advisory: chocapikk.com
Researcher: Valentin Lobstein
Status: Not defined

CVE: CVE-2026-26220 (🔒)
GCVE (CVE): GCVE-0-2026-26220
GCVE (VulDB): GCVE-100-346228

Entryinfo

Created: 02/17/2026 03:42
Updated: 02/20/2026 13:09
Changes: 02/17/2026 03:42 (66), 02/20/2026 13:09 (1)
Complete: 🔍
Cache ID: 216::103

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