CVE-2026-26220
Vulnerability Scoring
Analysis In Progress
CVE-2026-26220 Vulnerability Analysis & Exploit Details
CVE-2026-26220
Attack Complexity Details
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Attack Complexity:
Attack Complexity Analysis In Progress
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Attack Vector:
Attack Vector Under Analysis
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Privileges Required:
None
No authentication is required for exploitation.
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Scope:
Impact is confined to the initially vulnerable component.
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User Interaction:
None
No user interaction is necessary for exploitation.
CVE-2026-26220 Details
Status: Received on 17 Feb 2026, 03:16 UTC
Published on: 17 Feb 2026, 03:16 UTC
CVSS Release:
CVE-2026-26220 Vulnerability Summary
CVE-2026-26220: 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.
Assessing the Risk of CVE-2026-26220
Access Complexity Graph
The exploitability of CVE-2026-26220 depends on two key factors: attack complexity (the level of effort required to execute an exploit) and privileges required (the access level an attacker needs).
Exploitability Analysis for CVE-2026-26220
No exploitability data is available for CVE-2026-26220.
Understanding AC and PR
A lower complexity and fewer privilege requirements make exploitation easier. Security teams should evaluate these aspects to determine the urgency of mitigation strategies, such as patch management and access control policies.
Attack Complexity (AC) measures the difficulty in executing an exploit. A high AC means that specific conditions must be met, making an attack more challenging, while a low AC means the vulnerability can be exploited with minimal effort.
Privileges Required (PR) determine the level of system access necessary for an attack. Vulnerabilities requiring no privileges are more accessible to attackers, whereas high privilege requirements limit exploitation to authorized users with elevated access.
CVSS Score Breakdown Chart
Above is the CVSS Sub-score Breakdown for CVE-2026-26220, illustrating how Base, Impact, and Exploitability factors combine to form the overall severity rating. A higher sub-score typically indicates a more severe or easier-to-exploit vulnerability.
CIA Impact Analysis
Below is the Impact Analysis for CVE-2026-26220, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.
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Confidentiality:
None
CVE-2026-26220 does not compromise confidentiality.
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Integrity:
None
CVE-2026-26220 does not impact data integrity.
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Availability:
None
CVE-2026-26220 does not affect system availability.
CVE-2026-26220 References
External References
- https://chocapikk.com/posts/2026/lightllm-pickle-rce/
- https://github.com/ModelTC/LightLLM/issues/1213
- https://github.com/ModelTC/lightllm/blob/a27dfc88c2144ed51a6e160b6fbe20aad66c8fe0/lightllm/server/api_http.py#L310
- https://github.com/ModelTC/lightllm/blob/a27dfc88c2144ed51a6e160b6fbe20aad66c8fe0/lightllm/server/api_http.py#L331
- https://lightllm-en.readthedocs.io/en/latest/index.html
- https://www.vulncheck.com/advisories/lightllm-pd-mode-unsafe-deserialization-rce
CWE Common Weakness Enumeration
CWE-502CAPEC Common Attack Pattern Enumeration and Classification
- Object Injection CAPEC-586 An adversary attempts to exploit an application by injecting additional, malicious content during its processing of serialized objects. Developers leverage serialization in order to convert data or state into a static, binary format for saving to disk or transferring over a network. These objects are then deserialized when needed to recover the data/state. By injecting a malformed object into a vulnerable application, an adversary can potentially compromise the application by manipulating the deserialization process. This can result in a number of unwanted outcomes, including remote code execution.
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