CVE-2023-26819

Publication date 19 April 2025

Last updated 26 January 2026

Ubuntu priority

Cvss 3 Severity Score

Description

cJSON 1.7.15 might allow a denial of service via a crafted JSON document such as {"a": true, "b": [ null,9999999999999999999999999999999999999999999999912345678901234567]}.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
cjson	26.04 LTS resolute	Not affected
	25.10 questing	Not affected
	25.04 plucky	Ignored end of life, was needed
	24.10 oracular	Ignored end of life, was needs-triage
	24.04 LTS noble	Fixed 1.7.17-1ubuntu0.1~esm3
	22.04 LTS jammy	Fixed 1.7.15-1ubuntu0.1
	20.04 LTS focal	Fixed 1.7.10-1.1ubuntu0.1~esm1

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Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
cjson	Upstream: a328d65

Severity score breakdown

Parameter	Value
Base score	2.9 · Low
Attack vector	Local
Attack complexity	High
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	Low
Vector	CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

References

Related Ubuntu Security Notices (USN)

USN-7973-1
cJSON vulnerabilities
23 January 2026