Missing Release of Memory after Effective Lifetime Affecting ujson package, versions [5.4.0,5.12.0)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published18 Mar 2026
- disclosed18 Mar 2026
- creditCameron Criswell
Introduced: 18 Mar 2026
CVE-2026-32874 (opens in a new tab)How to fix?
Upgrade ujson to version 5.12.0 or higher.
Overview
ujson is an Ultra fast JSON encoder and decoder for Python
Affected versions of this package are vulnerable to Missing Release of Memory after Effective Lifetime in the ujson.load(), ujson.loads(), or ujson.decode() functions when parsing large integers outside the range [-2^63, 2^64 - 1]. An attacker can cause excessive memory consumption leading to denial of service by submitting specially crafted JSON payloads containing such large integers.