Detections
Analytics

SCA: security update for ujson (GHSA-wgvc-ghv9-3pmm)

high Tenable Cloud Security Plugin ID 438939

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - UltraJSON is a fast JSON encoder and decoder written in pure C with bindings for Python 3.7+. Versions
 5.4.0 through 5.11.0 contain an accumulating memory leak in JSON parsing large (outside of the range
 [-2^63, 2^64 - 1]) integers. The leaked memory is a copy of the string form of the integer plus an
 additional NULL byte. The leak occurs irrespective of whether the integer parses successfully or is
 rejected due to having more than sys.get_int_max_str_digits() digits, meaning that any sized leak per
 malicious JSON can be achieved provided that there is no limit on the overall size of the payload. Any
 service that calls ujson.load()/ujson.loads()/ujson.decode() on untrusted inputs is affected and
 vulnerable to denial of service attacks. This issue has been fixed in version 5.12.0. (CVE-2026-32874)

Solution

Update the ujson library and its related packages to version 5.12.0 or later.

See Also

https://github.com/advisories/GHSA-wgvc-ghv9-3pmm

Plugin Details

Severity: High

ID: 438939

Version: Revision 1.9

Type: Local

Family: SCA Checks

Published: 3/18/2026

Updated: 7/2/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.72

Vendor

Vendor Severity: High

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2026-32874

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 3/18/2026

Vulnerability Publication Date: 3/18/2026

Reference Information

CVE: CVE-2026-32874

cwe: CWE-401