CVE-2025-5302
Denial of Service (DOS) in JSONReader in run-llama/llama_index
A denial of service vulnerability exists in the JSONReader component of the run-llama/llama_index repository, specifically in version v0.12.37. The vulnerability is caused by uncontrolled recursion when parsing deeply nested JSON files, which can lead to Python hitting its maximum recursion depth limit. This results in high resource consumption and potential crashes of the Python process. The issue is resolved in version 0.12.38.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Denial of Service (DOS) in JSONReader in run-llama/llama_index
A denial of service vulnerability exists in the JSONReader component of the run-llama/llama_index repository, specifically in version v0.12.37. The vulnerability is caused by uncontrolled recursion when parsing deeply nested JSON files, which can lead to Python hitting its maximum recursion depth limit. This results in high resource consumption and potential crashes of the Python process. The issue is resolved in version 0.12.38.
- Record
CVE-2025-5302- CVSS 3.0
- 8.6 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H - Weakness
- CWE-674
- Updated
- 2026-11-02
EUVDEUVD-2025-25708
A denial of service vulnerability exists in the JSONReader component of the run-llama/llama_index repository, specifically in version v0.12.37. The vulnerability is caused by uncontrolled recursion when parsing deeply nested JSON files, which can lead to Python hitting its maximum recursion depth limit. This results in high resource consumption and potential crashes of the Python process. The issue is resolved in version 0.12.38.
- Record
EUVD-2025-25708- CVSS 3.0
- 8.6 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-7753-xrfw-ch36
LlamaIndex affected by a Denial of Service (DOS) in JSONReader
A denial of service vulnerability exists in the JSONReader component of the run-llama/llama_index repository, specifically in version v0.12.37. The vulnerability is caused by uncontrolled recursion when parsing deeply nested JSON files, which can lead to Python hitting its maximum recursion depth limit. This results in high resource consumption and potential crashes of the Python process. The issue is resolved in version 0.12.38.
- Record
GHSA-7753-xrfw-ch36- CVSS 3.0
- 8.6 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H - Weakness
- CWE-674
- Updated
- 2026-11-02
NVD
A denial of service vulnerability exists in the JSONReader component of the run-llama/llama_index repository, specifically in version v0.12.37. The vulnerability is caused by uncontrolled recursion when parsing deeply nested JSON files, which can lead to Python hitting its maximum recursion depth limit. This results in high resource consumption and potential crashes of the Python process. The issue is resolved in version 0.12.38.
- Record
CVE-2025-5302- CVSS 3.0
- 8.6 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H - Weakness
- CWE-674
- Updated
- 2026-11-02
OSV
Denial of Service (DOS) in JSONReader in run-llama/llama_index
A denial of service vulnerability exists in the JSONReader component of the run-llama/llama_index repository, specifically in version v0.12.37. The vulnerability is caused by uncontrolled recursion when parsing deeply nested JSON files, which can lead to Python hitting its maximum recursion depth limit. This results in high resource consumption and potential crashes of the Python process. The issue is resolved in version 0.12.38.
- Record
CVE-2025-5302- CVSS 3.0
- 8.6 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H - Weakness
- CWE-674
- Updated
- 2026-11-02
OSVGHSA-7753-xrfw-ch36
LlamaIndex affected by a Denial of Service (DOS) in JSONReader
A denial of service vulnerability exists in the JSONReader component of the run-llama/llama_index repository, specifically in version v0.12.37. The vulnerability is caused by uncontrolled recursion when parsing deeply nested JSON files, which can lead to Python hitting its maximum recursion depth limit. This results in high resource consumption and potential crashes of the Python process. The issue is resolved in version 0.12.38.
- Record
GHSA-7753-xrfw-ch36- CVSS 3.0
- 8.6 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H - Weakness
- CWE-674
- Updated
- 2026-11-02
OSVPYSEC-2026-1561
LlamaIndex affected by a Denial of Service (DOS) in JSONReader
A denial of service vulnerability exists in the JSONReader component of the run-llama/llama_index repository, specifically in version v0.12.37. The vulnerability is caused by uncontrolled recursion when parsing deeply nested JSON files, which can lead to Python hitting its maximum recursion depth limit. This results in high resource consumption and potential crashes of the Python process. The issue is resolved in version 0.12.38.
- Record
PYSEC-2026-1561- CVSS 3.0
- 8.6 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
llama-index-corePyPI |
before 0.12.38 | 0.12.38 |
llama-index-corePyPI |
before 0.12.38, plus listed versions 0.10.00.10.10.10.100.10.110.10.11.post1 Show 45 moreShow less0.10.120.10.130.10.140.10.14.post10.10.150.10.160.10.16.post10.10.170.10.180.10.18.post10.10.190.10.20.10.200.10.20.post10.10.20.post20.10.20.post30.10.210.10.21.post10.10.220.10.230.10.23.post10.10.240.10.24.post10.10.24a10.10.250.10.25.post10.10.25.post20.10.25.post30.10.25a10.10.260.10.270.10.280.10.290.10.30.10.300.10.310.10.320.10.330.10.340.10.350.10.35.post10.10.360.10.370.10.37.post10.10.38 |
0.12.38 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2025-5302 is a high vulnerability (CVSS 8.6) in Run-llama Run-llama/llama Index, published August 25, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.29%, the 21st percentile. Fixed in llama-index-core 0.12.38.
References
huntr.com/bounties/70041b81-de9e-4046-8c0e-6ccd557048a6
github.com/run-llama/llama_index/commit/c032843a02ce38fd8f284b2aa5a37fd1c17ae635
nvd.nist.gov/vuln/detail/CVE-2025-5302
pypi.org/project/llama-index-core
Left out here: 160 versions. The JSON record has them.