USN-8219-1: ujson Ubuntu

CVSS: UnknownPublished
Published 28-04-2026Last modified 30-06-2026
Open JSON

Vulnerability summary

USN-8219-1 is a vulnerability in ujson Ubuntu with no CVSS score yet.

Overall risk
0/100
0100
Minimal · default modelHow is this calculated?
CVSS score
Not scored
010
No CVSS score recorded
EPSS score
Not scored
0%100%
No EPSS score yet
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 0 · Related 2
CVE-2026-32874CVE-2026-32875

Timeline

  1. 28-04-2026
    PublishedVulnerability first disclosed.
  2. 30-06-2026
    Last modifiedVulnerability information updated.

Description

ujson vulnerabilities Cameron Criswell discovered that UltraJSON contained a memory leak that would occur when parsing large integers. An attacker could possibly use this issue to cause UltraJSON to crash, resulting in a denial of service. This issue only affected Ubuntu 24.04 LTS, Ubuntu 25.10, and Ubuntu 26.04 LTS. (CVE-2026-32874) It was discovered that UltraJSON contained integer overflow/underflow issues when calculating how much memory to reserve for indentation in certain instances. An attacker could possibly use this issue to cause UltraJSON to crash, resulting in a denial of service. (CVE-2026-32875)

CVSS metrics

Risk metrics not yet published.

EPSS trend

No EPSS score has been published for this record yet.

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu1 product
  • ujson< 5.1.0-1ubuntu0.1~esm2 | < 5.9.0-1ubuntu0.1~esm1 | < 5.10.0-1ubuntu0.1 | < 5.11.0-3ubuntu0.1

1 vendor · 1 product

References

3 links