Headline
GHSA-3wxx-q3gv-pvvv: LlamaIndex vulnerable to DoS attack through uncontrolled recursive JSON parsing
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.
- GitHub Advisory Database
- GitHub Reviewed
- CVE-2025-5472
LlamaIndex vulnerable to DoS attack through uncontrolled recursive JSON parsing
Moderate severity GitHub Reviewed Published Jul 7, 2025 to the GitHub Advisory Database • Updated Jul 8, 2025
Package
pip llama-index-core (pip)
Affected versions
< 0.12.38
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.
References
- https://nvd.nist.gov/vuln/detail/CVE-2025-5472
- run-llama/llama_index@c032843
- https://huntr.com/bounties/df187bda-7911-4823-a19a-e15b2c66b0d4
Published to the GitHub Advisory Database
Jul 7, 2025