id: PYSEC-2025-250
published: "2025-07-07T10:15:27.047Z"
modified: "2026-07-13T05:49:41.008783Z"
aliases:
- CVE-2025-3225
details: An XML Entity Expansion vulnerability, also known as a 'billion laughs' attack, exists in the sitemap parser of the run-llama/llama_index repository, specifically affecting version v0.12.21. This vulnerability allows an attacker to supply a malicious Sitemap XML, leading to a Denial of Service (DoS) by exhausting system memory and potentially causing a system crash. The issue is resolved in version v0.12.29.
affected:
- package:
    name: llama-index
    ecosystem: PyPI
    purl: pkg:pypi/llama-index
  ranges:
  - type: ECOSYSTEM
    events:
    - introduced: 0.12.21
    - fixed: 0.12.29
  versions:
  - 0.12.21
  - 0.12.22
  - 0.12.23
  - 0.12.24
  - 0.12.25
  - 0.12.26
  - 0.12.27
  - 0.12.28
  ecosystem_specific: {}
references:
- type: FIX
  url: https://github.com/run-llama/llama_index/commit/4f6ee062b19212106a2632af9c9521fc7f0a3584
- type: EVIDENCE
  url: https://huntr.com/bounties/e33c0699-e9a2-49aa-837b-5363205637a2
severity:
- type: CVSS_V3
  score: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H