CVE-2026-44660
7.5 · HIGHOverview
CVE-2026-44660 is a high-severity vulnerability affecting ultrajson_project ultrajson. It was published on May 27, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
UltraJSON is a fast JSON encoder and decoder written in pure C with bindings for Python 3.7+. Prior to 5.12.1, when ujson.dump() writes to a file-like object and the write operation raises an exception, the serialized JSON string object is not decremented, leaking memory. Each failed write operation leaks the full size of the serialized payload. This vulnerability is fixed in 5.12.1.
Remediation
Check the references section for vendor advisories and patches from ultrajson_project. Update ultrajson to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| ultrajson_project | ultrajson | >= 0, < 5.12.1 | Affected |
References
Frequently Asked Questions
What is CVE-2026-44660?
CVE-2026-44660 is a high-severity vulnerability affecting ultrajson_project ultrajson. It was published on May 27, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).
How severe is CVE-2026-44660?
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2026-44660?
Check the references section for vendor advisories and patches from ultrajson_project. Update ultrajson to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-44660?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-44660 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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