id: PYSEC-2025-251
published: "2025-07-07T10:15:28.873Z"
modified: "2026-07-13T05:49:41.165402Z"
aliases:
- CVE-2025-5472
details: 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:
- package:
    name: llama-index
    ecosystem: PyPI
    purl: pkg:pypi/llama-index
  ranges:
  - type: ECOSYSTEM
    events:
    - introduced: 0.12.28
    - fixed: 0.12.38
  versions:
  - 0.12.28
  - 0.12.29
  - 0.12.30
  - 0.12.31
  - 0.12.32
  - 0.12.33
  - 0.12.34
  - 0.12.35
  - 0.12.36
  - 0.12.37
  ecosystem_specific: {}
references:
- type: FIX
  url: https://github.com/run-llama/llama_index/commit/c032843a02ce38fd8f284b2aa5a37fd1c17ae635
- type: EVIDENCE
  url: https://huntr.com/bounties/df187bda-7911-4823-a19a-e15b2c66b0d4
severity:
- type: CVSS_V3
  score: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H