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LlamaIndex vulnerable to data loss through hash collisions in its DocugamiReader class

Moderate severity GitHub Reviewed Published Jul 10, 2025 to the GitHub Advisory Database • Updated Jul 10, 2025

Package

pip llama-index (pip)

Affected versions

< 0.12.41

Patched versions

0.12.41
pip llama-index-readers-docugami (pip)
< 0.3.1
0.3.1

Description

A vulnerability in the DocugamiReader class of the run-llama/llama_index repository, up to but excluding version 0.12.41, 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.

References

Published by the National Vulnerability Database Jul 10, 2025
Published to the GitHub Advisory Database Jul 10, 2025
Reviewed Jul 10, 2025
Last updated Jul 10, 2025

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
Low

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(13th percentile)

Weaknesses

Expected Behavior Violation

A feature, API, or function does not perform according to its specification. Learn more on MITRE.

CVE ID

CVE-2025-6211

GHSA ID

GHSA-5hq9-5r78-2gjh

Source code

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