CVE-2026-44660
📛 CVE Title
(no title)
Description
UltraJSON has a Memory Leak in ujson.dump() on Write Failure
Description (MITRE) cveawg.mitre.org
Pulled from cveawg.mitre.org/api/cve/CVE-2026-44660 on 2026-07-28. Shown when MITRE's text differs from the cvelistV5 mirror.
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.
Overview
- State
- —
- Assigner (CNA)
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- CVSS severity
- high
- CVSS score
- 7.5 / 10
- CVSS vector
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H- Effective score
- 7.5 / 10 HIGH source: CNA overview
- CWE(s)
- —
- Reserved
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- Published
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- Last updated
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- Source
- https://www.tenable.com/cve/CVE-2026-44660
- Linked Threat
- CVE-2026-44660 — CVE-2026-44660
NVD / KEV / EPSS data refreshed 2026-05-25 00:02 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.
European Union Vulnerability Database ENISA EUVD
ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.
- EUVD ID
-
EUVD-2026-32663
EUVD enrichment is queued; refresh the page in a few seconds.
Vendor references (0)
References embedded in the original CVE record by the assigning CNA.
None in the CVE record.
Web references (6)
DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.
- https://github.com/ultrajson/ultrajson/commit/82af1d0ac01d09aa40c887b460d44b9d9f4bccd9 tenable:github.com
- https://github.com/ultrajson/ultrajson/releases/tag/5.12.1 tenable:github.com
- https://github.com/ultrajson/ultrajson/security/advisories/GHSA-c38f-wx89-p2xg tenable:github.com
- https://www.first.org/epss/ tenable:www.first.org
- https://nvd.nist.gov/vuln/detail/CVE-2026-44660 tenable:nvd.nist.gov
- https://www.cve.org/CVERecord?id=CVE-2026-44660 tenable:www.cve.org
Remediations (10)
Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.
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web:4sysops.com
Starting in April 2026 , Windows updates will change the default Kerberos ticket issuance behavior to AES-SHA1 for accounts without explicit encryption settings, while RC4 can still be used where explicitly enabled. This change, driven by CVE - 2026 -20833, affects every Windows Server environment where service accounts or devices still rely on RC4. Any service account, NAS device, or legacy ...
2026-05-26 02:53 UTC -
web:blog.qualys.com
With Qualys Policy Audit's out-of-the-box mitigation or Compensatory Controls, which reduce the risk of a vulnerability being exploited because the remediation ( fix / patch ) cannot be done immediately, these security controls are not recommended by any industry standards, such as CIS and DISA-STIG.
2026-05-26 02:53 UTC -
web:cyberpress.org
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added two actively exploited Microsoft Defender vulnerabilities to its Known Exploited Vulnerabilities (KEV) catalog, issuing an urgent remediation directive for federal agencies with a due date of June 3, 2026 .
2026-05-26 02:53 UTC -
web:krebsonsecurity.com
For a clickable, per- patch breakdown, check out the SANS Internet Storm Center Patch Tuesday roundup. Running into problems applying any of these updates?
2026-05-26 02:53 UTC -
web:msrc.microsoft.com
The Microsoft Security Response Center (MSRC) investigates all reports of security vulnerabilities affecting Microsoft products and services, and provides the information here as part of the ongoing effort to help you manage security risks and help keep your systems protected.
2026-05-26 02:53 UTC -
web:nvd.nist.gov
An official website of the United States government Here's how you know
2026-05-26 02:53 UTC -
web:thewincentral.com
However, there's a catch: There is no public patch or simple fix yet Organizations experiencing the issue must: Contact Microsoft Support directly Request a custom workaround or mitigation Immediate Actions You Should Take If you manage enterprise infrastructure, don't wait: Check your systems immediately Identify non-Global Catalog domain ...
2026-05-26 02:53 UTC -
web:www.crowdstrike.com
Microsoft's April 2026 Patch Tuesday addresses 164 CVEs , featuring 8 Critical vulnerabilities, one exploited zero-day, and one disclosed zero-day.
2026-05-26 02:53 UTC -
web:www.techrepublic.com
Microsoft's April 2026 Patch Tuesday fixes 165 vulnerabilities, including two zero-days, in one of the company's largest monthly security updates.
2026-05-26 02:53 UTC -
web:www.windowslatest.com
Windows 11 April 2026 update adds Narrator Copilot support, faster Settings, File Explorer fixes, and key security improvements.
2026-05-26 02:53 UTC
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