---
id: CVE-2025-5472
aliases:
  - GHSA-3wxx-q3gv-pvvv
  - PYSEC-2026-1559
title: >-
  LlamaIndex vulnerable to DoS attack through uncontrolled recursive JSON
  parsing
summary: >-
  LlamaIndex vulnerable to DoS attack through uncontrolled recursive JSON
  parsing
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'
vendor: llama-index-core
product: llama-index-core
ecosystem: pip
affected:
  - llama-index-core < 0.12.38
patched:
  - llama-index-core 0.12.38
published: '2025-07-07'
updated: '2026-07-07'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-3wxx-q3gv-pvvv'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2025-5472'
  - url: >-
      https://github.com/run-llama/llama_index/commit/c032843a02ce38fd8f284b2aa5a37fd1c17ae635
  - url: 'https://github.com/run-llama/llama_index'
  - url: 'https://huntr.com/bounties/df187bda-7911-4823-a19a-e15b2c66b0d4'
tags:
  - osv
  - pip
epss: 0.0034
epssPercentile: 0.27651
ingestedAt: '2026-07-08T18:25:45.201Z'
---

## Overview

The JSONReader in run-llama/llama_index versions 0.12.28 is vulnerable to a stack overflow due to uncontrolled recursive JSON parsing. This vulnerability allows attackers to trigger a Denial of Service (DoS) by submitting deeply nested JSON structures, leading to a RecursionError and crashing applications. The root cause is the unsafe recursive traversal design and lack of depth validation, which makes the JSONReader susceptible to stack overflow when processing deeply nested JSON. This impacts the availability of services, making them unreliable and disrupting workflows. The issue is resolved in version 0.12.38.

## Affected packages

- `llama-index-core < 0.12.38`

## Remediation

Upgrade to a patched release:

- `llama-index-core 0.12.38`