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Medium

LlamaIndex vulnerable to DoS attack through uncontrolled recursive JSON parsing

  • Disclosed: 07.07.2025
  • Updated: 11.10.2026 14:17

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 software

Click a technology to see all vulnerabilities affecting it.

PlatformPackageVulnerable versionsFixed in
Python (PyPI) llama-index >= 0.12.28, < 0.12.38 0.12.38
Python (PyPI) llama-index-core < 0.12.38 0.12.38

References

CVSS score 6.5/10
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness (CWE)
CWE-674
Platform
Python (PyPI)
Package
llama-index, llama-index-core
Disclosed
07.07.2025
Updated
11.10.2026 14:17

Sources and licenses

OSV / GitHub Advisory Database - PYSEC-2025-251 - PyPA Advisory Database; CC BY 4.0

OSV / GitHub Advisory Database - GHSA-3wxx-q3gv-pvvv - CC BY 4.0

OSV / GitHub Advisory Database - PYSEC-2026-1559 - PyPA Advisory Database; CC BY 4.0

Vulnerability history: llama-index

All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.

All (22) in the archive
Total entries
22
First → latest
08.2023 01.2026
Without a fix
2
Exploited in attacks
0

Severity breakdown

  • Critical 5
  • High 11
  • Medium 6

Disclosures per year

Severity:
  1. LlamaIndex (run-llama/llama_index) versions up to and including 0.12.2 contain an uncontrolled resource consumption vulnerability in the VannaPack VannaQueryEngine implementation. The custom_query() l
    High · 7.5 CVE-2024-58339 < 0.12.3 0.12.3
  2. LlamaIndex (run-llama/llama_index) versions up to and including 0.11.6 contain an unsafe deserialization vulnerability in BGEM3Index.load_from_disk() in llama_index/indices/managed/bge_m3/base.py. The
    High · 7.8 CVE-2024-14021 < 0.11.7 0.11.7
  3. llama-index has Insecure Temporary File
    High · 7.1 CVE-2025-7707 < 0.13.0 0.13.0
  4. LlamaIndex vulnerable to Path Traversal attack through its encode_image function
    High · 7.5 CVE-2025-6209 >= 0.12.27, < 0.12.41 0.12.41
  5. LlamaIndex vulnerable to DoS attack through uncontrolled recursive JSON parsing this entry
    Medium · 6.5 CVE-2025-5472 >= 0.12.28, < 0.12.38 0.12.38
  6. LlamaIndex has an XML Entity Expansion vulnerability in its sitemap parser
    High · 7.5 CVE-2025-3225 >= 0.12.21, < 0.12.29 0.12.29
  7. LlamaIndex is vulnerable to Path Traversal attack through its ObsidianReader class
    High · 7.5 CVE-2025-3046 >= 0.12.23, < 0.12.28 0.12.28
  8. llama_index vulnerable to SQL Injection
    Critical · 9.8 CVE-2025-1793 < 0.12.28 0.12.28
  9. LlamaIndex DuckDBVectorStore vulnerable to SQL injection through ref_doc_id
    Critical · 9.8 CVE-2025-1750 >= 0.12.19, < 0.12.21 0.12.21
  10. LLama-Index CLI OS command injection vulnerability
    High · 7.8 CVE-2025-1753 <= 0.12.20 no fix
  11. LlamaIndex Vulnerable to Denial of Service (DoS)
    High · 7.5 CVE-2025-1752 >= 0.12.15, < 0.12.21 0.12.21
  12. LlamaIndex vulnerable to Creation of Temporary File in Directory with Insecure Permissions
    High · 7.1 CVE-2024-12911 < 0.12.3 0.12.3
  13. LlamaIndex Improper Handling of Exceptional Conditions vulnerability
    High · 7.5 CVE-2024-12704 <= 0.12.5 no fix
  14. LlamaIndex includes an exec call for `import {cls_name}`
    Critical · 9.8 CVE-2024-45201 < 0.10.38 0.10.38
  15. RunGptLLM class in LlamaIndex has a command injection
    High · 8.8 CVE-2024-4181 >= 0.9.47, < 0.10.13 0.10.13
  16. LlamaIndex (aka llama_index) through 0.9.34 allows SQL injection via the Text-to-SQL feature in NLSQLTableQueryEngine, SQLTableRetrieverQueryEngine, NLSQLRetriever, RetrieverQueryEngine, and PGVectorS
    Critical · 9.8 CVE-2024-23751 < 0.9.35 0.9.35
  17. An issue in llama_index v.0.7.13 and before allows a remote attacker to execute arbitrary code via the `exec` parameter in PandasQueryEngine function.
    Critical · 9.8 CVE-2023-39662 < 0.7.14 0.7.14

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