CVE-2022-31117: PYSEC-2026-1056 - Potential double free of buffer during string decoding

CVE-2022-31117 · Severity: low · CVSS 3.1 · Published 2026-07-06

Potential double free of buffer during string decoding

Technologies: ujson (PyPI). Vendors: PyPI.

Quick answers

Is CVE-2022-31117 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2022-31117 being exploited in the wild.
How severe is CVE-2022-31117?
Low severity, with a CVSS score of 3.1, published 6 July 2026.
Which products and versions are affected?
ujson (PyPI) ECOSYSTEM:introduced=0,fixed=5.4.0.
Is there a fix for CVE-2022-31117?
Yes. ujson (PyPI): upgrade to 5.4.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2022-31117?
Check whether you run ujson (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

  • ujson (PyPI): upgrade to 5.4.0 or later
    pip install "ujson>=5.4.0"

Affected products

  • ujson (PyPI) ECOSYSTEM:introduced=0,fixed=5.4.0

Identifiers

  • CVE-2022-31117
  • GHSA-fm67-cv37-96ff
  • PYSEC-2026-1056

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