CVE-2025-6208: Llama index core Remote Code Execution Vulnerability

MODERATE
Advisory Identifier: GHSA-488g-hw5f-x29p
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CVSS 5.3
CWE-400
Published
Advisory Summary

CVE-2025-6208 is a MODERATE (CVSS 5.3) remote code execution vulnerability (CWE-400: Uncontrolled Resource Consumption) affecting Llama index core libraries in the PyPI ecosystem. The issue involves llama-index-core vulnerable to uncontrolled resource consumption. Remediation is available by upgrading affected packages to version 0.12.41.

CVE-2025-6208 at a Glance

CVE Identifier CVE-2025-6208
GHSA Identifier GHSA-488g-hw5f-x29p
Severity MODERATE
CVSS v3.1 Base Score 5.3
CWE Classification CWE-400: Uncontrolled Resource Consumption
Affected Product Llama index core
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 5.3

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability Low (A:L)

How to Fix CVE-2025-6208

To remediate this vulnerability, upgrade all affected Llama index core dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

llama-index-core fixed: 0.12.41 
pip install llama-index-core>=0.12.41
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show llama-index-core

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2025-6208, inspect your installed packages using pip:

pip show llama-index-core

Analyze the terminal output to locate any version of Llama index core in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.12.41), your application is affected.

Note: The pip show llama-index-core command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-400: Uncontrolled Resource Consumption, where the product does not properly control the allocation and maintenance of a limited resource. In Llama index core, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

The `SimpleDirectoryReader` component in `llama_index.core` version 0.12.23 suffers from uncontrolled memory consumption due to a resource management flaw. The vulnerability arises because the user-specified file limit (`num_files_limit`) is applied after all files in a directory are loaded into memory. This can lead to memory exhaustion and degraded performance, particularly in environments with limited resources. The issue is resolved in version 0.12.41.

CVE-2025-6208 Affected Llama index core Versions

1 component(s)
Fixed Versions:
0.12.41
Product / Package Ecosystem Affected Versions Fixed Version
llama-index-core
pypi/llama-index-core
PyPI
< 0.12.41
0.12.41

References

NVD — CVE-2025-6208 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-6208
Security Fix Commit FIX COMMIT
https://github.com/run-llama/llama_index/commit/53614e2f7913c0e86b58add9470b3c900b6c60b2
Llama index core Source Repository REPOSITORY
https://github.com/run-llama/llama_index
huntr.com/bounties/7d722bb6-6... WEB
https://huntr.com/bounties/7d722bb6-6567-4608-8b23-f95048d7605a

Frequently Asked Questions

What is CVE-2025-6208?
CVE-2025-6208 is a security vulnerability in Llama index core involving llama-index-core vulnerable to Uncontrolled Resource Consumption under CWE-400: Uncontrolled Resource Consumption.
Which Llama index core versions are affected?
Affected versions include releases prior to 0.12.41 across affected packages: llama-index-core.
What version fixes CVE-2025-6208?
Upgrading to 0.12.41 (or the latest patched release for your respective branch) resolves the vulnerability.
Is llama-index-core affected?
Yes, llama-index-core is affected in releases prior to 0.12.41. Upgrade your dependency to 0.12.41 or later.
What is the CVSS score of CVE-2025-6208?
CVE-2025-6208 has a CVSS v3.1 base score of 5.3 (MODERATE) with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
What CWE is associated with CVE-2025-6208?
CVE-2025-6208 is classified under CWE-400: Uncontrolled Resource Consumption (The product does not properly control the allocation and maintenance of a limited resource.).
How can I check PyPI dependencies for CVE-2025-6208?
Run the dependency tree command: 'pip show llama-index-core'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-488g-hw5f-x29p",
  "modified" : "2026-02-02T22:04:45Z",
  "published" : "2026-02-02T12:31:14Z",
  "aliases" : [ "CVE-2025-6208" ],
  "summary" : "llama-index-core vulnerable to Uncontrolled Resource Consumption",
  "details" : "The `SimpleDirectoryReader` component in `llama_index.core` version 0.12.23 suffers from uncontrolled memory consumption due to a resource management flaw. The vulnerability arises because the user-specified file limit (`num_files_limit`) is applied after all files in a directory are loaded into memory. This can lead to memory exhaustion and degraded performance, particularly in environments with limited resources. The issue is resolved in version 0.12.41.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "llama-index-core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.12.41"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-6208"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/run-llama/llama_index/commit/53614e2f7913c0e86b58add9470b3c900b6c60b2"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/run-llama/llama_index"
  }, {
    "type" : "WEB",
    "url" : "https://huntr.com/bounties/7d722bb6-6567-4608-8b23-f95048d7605a"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-400" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-02-02T22:04:45Z",
    "nvd_published_at" : "2026-02-02T11:16:17Z"
  }
}