CVE-2024-12704: Llama index core LlamaIndex Improper Handling Of Exceptional Vulnerability

HIGH
Advisory Identifier: GHSA-j3wr-m6xh-64hg
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CVSS 7.5
CWE-755 CWE-835
Published
Advisory Summary

CVE-2024-12704 is a HIGH (CVSS 7.5) llamaindex improper handling of exceptional vulnerability (CWE-755: Improper Handling of Exceptional Conditions) affecting Llama index core libraries in the PyPI ecosystem. The issue involves llamaindex improper handling of exceptional conditions vulnerability. Remediation is available by upgrading affected packages to version 0.12.6.

CVE-2024-12704 at a Glance

CVE Identifier CVE-2024-12704
GHSA Identifier GHSA-j3wr-m6xh-64hg
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-755: Improper Handling of Exceptional Conditions
Affected Product Llama index core
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 7.5

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:H).

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 High (A:H)

How to Fix CVE-2024-12704

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: 0.12.6 
pip install llama-index-core>=0.12.6
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-2024-12704, 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 0.12.6), 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-755: Improper Handling of Exceptional Conditions, where the product does not handle or incorrectly handles an exceptional condition. 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

A vulnerability in the LangChainLLM class of the run-llama/llama_index repository, version v0.12.5, allows for a Denial of Service (DoS) attack. The stream_complete method executes the llm using a thread and retrieves the result via the get_response_gen method of the StreamingGeneratorCallbackHandler class. If the thread terminates abnormally before the _llm.predict is executed, there is no exception handling for this case, leading to an infinite loop in the get_response_gen function. This can be triggered by providing an input of an incorrect type, causing the thread to terminate and the process to continue running indefinitely.

CVE-2024-12704 Affected Llama index core Versions

1 component(s)
Fixed Versions:
0.12.6
Product / Package Ecosystem Affected Versions Fixed Version
llama-index-core
pypi/llama-index-core
PyPI
< 0.12.6
0.12.6

References

NVD — CVE-2024-12704 NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-12704
Security Fix Commit FIX COMMIT
https://github.com/run-llama/llama_index/commit/d1ecfb77578d089cbe66728f18f635c09aa32a05
Llama index core Source Repository REPOSITORY
https://github.com/run-llama/llama_index
huntr.com/bounties/a0b638fd-2... WEB
https://huntr.com/bounties/a0b638fd-21c6-4ba7-b381-6ab98472a02a

Frequently Asked Questions

What is CVE-2024-12704?
CVE-2024-12704 is a security vulnerability in Llama index core involving LlamaIndex Improper Handling of Exceptional Conditions vulnerability under CWE-755: Improper Handling of Exceptional Conditions.
Which Llama index core versions are affected?
Affected versions include releases prior to 0.12.6 across affected packages: llama-index-core.
What version fixes CVE-2024-12704?
Upgrading to 0.12.6 (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 0.12.6. Upgrade your dependency to 0.12.6 or later.
What is the CVSS score of CVE-2024-12704?
CVE-2024-12704 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2024-12704?
CVE-2024-12704 is classified under CWE-755: Improper Handling of Exceptional Conditions (The product does not handle or incorrectly handles an exceptional condition.).
How can I check PyPI dependencies for CVE-2024-12704?
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-j3wr-m6xh-64hg",
  "modified" : "2026-02-24T16:08:07Z",
  "published" : "2025-03-20T12:32:43Z",
  "aliases" : [ "CVE-2024-12704" ],
  "summary" : "LlamaIndex Improper Handling of Exceptional Conditions vulnerability",
  "details" : "A vulnerability in the LangChainLLM class of the run-llama/llama_index repository, version v0.12.5, allows for a Denial of Service (DoS) attack. The stream_complete method executes the llm using a thread and retrieves the result via the get_response_gen method of the StreamingGeneratorCallbackHandler class. If the thread terminates abnormally before the _llm.predict is executed, there is no exception handling for this case, leading to an infinite loop in the get_response_gen function. This can be triggered by providing an input of an incorrect type, causing the thread to terminate and the process to continue running indefinitely.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "llama-index-core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.12.6"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2024-12704"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/run-llama/llama_index/commit/d1ecfb77578d089cbe66728f18f635c09aa32a05"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/run-llama/llama_index"
  }, {
    "type" : "WEB",
    "url" : "https://huntr.com/bounties/a0b638fd-21c6-4ba7-b381-6ab98472a02a"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-755", "CWE-835" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-03-21T17:40:52Z",
    "nvd_published_at" : "2025-03-20T10:15:29Z"
  }
}