CVE-2025-1752: Llama index Denial of Service Vulnerability

HIGH
Advisory Identifier: GHSA-7c85-87cp-mr6g
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CVSS 7.5
CWE-400 CWE-674
Published
Advisory Summary

CVE-2025-1752 is a HIGH (CVSS 7.5) denial of service vulnerability (CWE-400: Uncontrolled Resource Consumption) affecting Llama index libraries in the PyPI ecosystem. The issue involves llamaindex vulnerable to denial of service (dos). Remediation is available by upgrading affected packages to version 0.12.21.

CVE-2025-1752 at a Glance

CVE Identifier CVE-2025-1752
GHSA Identifier GHSA-7c85-87cp-mr6g
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-400: Uncontrolled Resource Consumption
Affected Product Llama index
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-2025-1752

To remediate this vulnerability, upgrade all affected Llama index 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 fixed: 0.12.21 
pip install llama-index>=0.12.21
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

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2025-1752, inspect your installed packages using pip:

pip show llama-index

Analyze the terminal output to locate any version of Llama index in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.12.21), your application is affected.

Note: The pip show llama-index 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, 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 Denial of Service (DoS) vulnerability has been identified in the KnowledgeBaseWebReader class of the run-llama/llama_index project, affecting version ~ latest(v0.12.15). The vulnerability arises due to inappropriate secure coding measures, specifically the lack of proper implementation of the max_depth parameter in the get_article_urls function. This allows an attacker to exhaust Python's recursion limit through repeated function calls, leading to resource consumption and ultimately crashing the Python process.

CVE-2025-1752 Affected Llama index Versions

1 component(s)
Fixed Versions:
0.12.21
Product / Package Ecosystem Affected Versions Fixed Version
llama-index
pypi/llama-index
PyPI
≥ 0.12.15
< 0.12.21
0.12.21

References

NVD — CVE-2025-1752 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-1752
Security Fix Commit FIX COMMIT
https://github.com/run-llama/llama_index/commit/3c65db2947271de3bd1927dc66a044da385de4da
Llama index Source Repository REPOSITORY
https://github.com/run-llama/llama_index
huntr.com/bounties/cd7b9082-7... WEB
https://huntr.com/bounties/cd7b9082-7d75-42e4-84f5-dbee23cbc467

Frequently Asked Questions

What is CVE-2025-1752?
CVE-2025-1752 is a security vulnerability in Llama index involving LlamaIndex Vulnerable to Denial of Service (DoS) under CWE-400: Uncontrolled Resource Consumption.
Which Llama index versions are affected?
Affected versions include releases prior to 0.12.21 across affected packages: llama-index.
What version fixes CVE-2025-1752?
Upgrading to 0.12.21 (or the latest patched release for your respective branch) resolves the vulnerability.
Is llama-index affected?
Yes, llama-index is affected in releases prior to 0.12.21. Upgrade your dependency to 0.12.21 or later.
What is the CVSS score of CVE-2025-1752?
CVE-2025-1752 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-2025-1752?
CVE-2025-1752 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-2025-1752?
Run the dependency tree command: 'pip show llama-index'. 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-7c85-87cp-mr6g",
  "modified" : "2025-10-15T16:12:12Z",
  "published" : "2025-05-10T15:30:28Z",
  "aliases" : [ "CVE-2025-1752" ],
  "summary" : "LlamaIndex Vulnerable to Denial of Service (DoS)",
  "details" : "A Denial of Service (DoS) vulnerability has been identified in the KnowledgeBaseWebReader class of the run-llama/llama_index project, affecting version ~ latest(v0.12.15). The vulnerability arises due to inappropriate secure coding measures, specifically the lack of proper implementation of the max_depth parameter in the get_article_urls function. This allows an attacker to exhaust Python's recursion limit through repeated function calls, leading to resource consumption and ultimately crashing the Python process.",
  "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"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0.12.15"
      }, {
        "fixed" : "0.12.21"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-1752"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/run-llama/llama_index/commit/3c65db2947271de3bd1927dc66a044da385de4da"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/run-llama/llama_index"
  }, {
    "type" : "WEB",
    "url" : "https://huntr.com/bounties/cd7b9082-7d75-42e4-84f5-dbee23cbc467"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-400", "CWE-674" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-05-12T20:16:19Z",
    "nvd_published_at" : "2025-05-10T14:15:32Z"
  }
}