CVE-2025-5472: PYSEC-2026-1559 - LlamaIndex vulnerable to DoS attack through uncontrolled recursive JSON parsing

CVE-2025-5472 · Severity: low · CVSS 3 · Published 2026-07-07

LlamaIndex vulnerable to DoS attack through uncontrolled recursive JSON parsing

Technologies: llama-index (PyPI), llama-index-core (PyPI). Vendors: PyPI.

Quick answers

Is CVE-2025-5472 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2025-5472 being exploited in the wild.
How severe is CVE-2025-5472?
Low severity, with a CVSS score of 3, published 7 July 2026.
Which products and versions are affected?
llama-index (PyPI) ECOSYSTEM:introduced=0.12.28,fixed=0.12.38; llama-index-core (PyPI) ECOSYSTEM:introduced=0,fixed=0.12.38.
Is there a fix for CVE-2025-5472?
Yes. llama-index (PyPI): upgrade to 0.12.38 or later; llama-index-core (PyPI): upgrade to 0.12.38 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2025-5472?
Check whether you run llama-index (PyPI) or llama-index-core (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • llama-index (PyPI): upgrade to 0.12.38 or later
    pip install "llama-index>=0.12.38"
  • llama-index-core (PyPI): upgrade to 0.12.38 or later
    pip install "llama-index-core>=0.12.38"

Affected products

  • llama-index (PyPI) ECOSYSTEM:introduced=0.12.28,fixed=0.12.38
  • llama-index-core (PyPI) ECOSYSTEM:introduced=0,fixed=0.12.38

Identifiers

  • CVE-2025-5472
  • GHSA-3wxx-q3gv-pvvv
  • PYSEC-2025-251
  • PYSEC-2026-1559

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