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.

Metrics

No CVSS v4.0

No CVSS v3.1

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction Required

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00152.

Exploitation poc

Automatable no

Technical Impact partial

Affected Vendors & Products

Vendors Products
Llamaindex
  • Llamaindex

Configuration 1 [-]

cpe:2.3:a:llamaindex:llamaindex:*:*:*:*:*:*:*:*

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Advisories
Source ID Title
EUVD EUVD EUVD-2025-20209 LlamaIndex vulnerable to DoS attack through uncontrolled recursive JSON parsing
Github GHSA Github GHSA GHSA-3wxx-q3gv-pvvv LlamaIndex vulnerable to DoS attack through uncontrolled recursive JSON parsing
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/run-llama/llama_index/commit/c032843a02ce38fd8f284b2aa5a37fd1c17ae635 cve-icon cve-icon cve-icon
https://huntr.com/bounties/df187bda-7911-4823-a19a-e15b2c66b0d4 cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2025-5472 cve-icon
https://www.cve.org/CVERecord?id=CVE-2025-5472 cve-icon
History

Wed, 30 Jul 2025 20:15:00 +0000

Type Values Removed Values Added
First Time appeared Llamaindex
Llamaindex llamaindex
CPEs cpe:2.3:a:llamaindex:llamaindex:*:*:*:*:*:*:*:*
Vendors & Products Llamaindex
Llamaindex llamaindex

Sun, 13 Jul 2025 13:45:00 +0000

Type Values Removed Values Added
Metrics epss

{'score': 0.00047}

 epss

{'score': 0.00069}

Tue, 08 Jul 2025 00:30:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 threat_severity

Moderate

Mon, 07 Jul 2025 12:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Mon, 07 Jul 2025 10:00:00 +0000

Type Values Removed Values Added
Description 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.
Title Denial of Service via Uncontrolled Recursive JSON Parsing in JSONReader in run-llama/llama_index
Weaknesses CWE-674
References
Metrics cvssV3_0

{'score': 6.5, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'}
cve-icon MITRE

Status: PUBLISHED

Assigner: @huntr_ai

Published:

Updated: 2025-07-07T11:23:35.709Z

Reserved: 2025-06-02T14:07:59.604Z

Link: CVE-2025-5472

cve-icon Vulnrichment

Updated: 2025-07-07T11:23:31.772Z

cve-icon NVD

Status : Analyzed

Published: 2025-07-07T10:15:28.873

Modified: 2025-07-30T20:03:35.977

Link: CVE-2025-5472

cve-icon Redhat

Severity : Moderate

Publid Date: 2025-07-07T09:55:56Z

Links: CVE-2025-5472 - Bugzilla

cve-icon OpenCVE Enrichment

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