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CVE-2025-6211— MD5 Hash Collision in run-llama/llama_index

Quick assessment

Affected
run-llama run-llama/llama_index
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

LlamaIndex是LlamaIndex开源的一个 LLM 应用程序的数据框架。 LlamaIndex 0.12.28及之前版本存在安全漏洞，该漏洞源于使用MD5哈希生成文档块ID，可能导致哈希冲突。

AI Predicted 6.5 Difficulty: Moderate EPSS 0.34% · P25

Possible ATT&CK Techniques 1 AI

T1565.001 · Stored Data Manipulation
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I. Basic Information for CVE-2025-6211

Vulnerability Information
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Vulnerability Title
MD5 Hash Collision in run-llama/llama_index
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the DocugamiReader class of the run-llama/llama_index repository, up to version 0.12.28, involves the use of MD5 hashing to generate IDs for document chunks. This approach leads to hash collisions when structurally distinct chunks contain identical text, resulting in one chunk overwriting another. This can cause loss of semantically or legally important document content, breakage of parent-child chunk hierarchies, and inaccurate or hallucinated responses in AI outputs. The issue is resolved in version 0.3.1.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
预期行为违背
Source: CVE Program / CVE List V5
Vulnerability Title
LlamaIndex 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
LlamaIndex是LlamaIndex开源的一个 LLM 应用程序的数据框架。 LlamaIndex 0.12.28及之前版本存在安全漏洞，该漏洞源于使用MD5哈希生成文档块ID，可能导致哈希冲突。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
run-llama run-llama/llama_index unspecified ~ 0.3.1 -

II. Public POCs for CVE-2025-6211

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III. Intelligence Information for CVE-2025-6211

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IV. Related Vulnerabilities

Same product: run-llama/llama_index
Same vendor: run-llama
Same weakness: CWE-440

V. Comments for CVE-2025-6211

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