CVE & CISA-KEV Catalog

CVE-2023-26819

LOW
2.9
CVSS v3
NVD

Description

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

CWE-440

How to fix

Remediation Available
cjsonDebian
Fixed in:1.7.14-1+deb11u2CVE-2023-26819
Fixed in:1.7.15-1+deb12u3CVE-2023-26819
Fixed in:1.7.18-3.1CVE-2023-26819
Fixed in:1.7.18-3.1CVE-2023-26819
cjsonUbuntu
Fixed in:1.7.10-1.1ubuntu0.1~esm1USN-7973-1
Fixed in:1.7.15-1ubuntu0.1USN-7973-1
Fixed in:1.7.17-1ubuntu0.1~esm3USN-7973-1
Fixed in:1.7.18-3.1ubuntu0.1USN-7973-1
libcjson1Ubuntu
Fixed in:1.7.10-1.1ubuntu0.1~esm1USN-7973-1
Fixed in:1.7.15-1ubuntu0.1USN-7973-1
Fixed in:1.7.17-1ubuntu0.1~esm3USN-7973-1
Fixed in:1.7.18-3.1ubuntu0.1USN-7973-1

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal
Attack ComplexityHigh
Privileges RequiredNone
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityNone
IntegrityNone
AvailabilityLow

CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

Exploit Intelligence

0.22%probability of exploitation in 30 days
13thpercentile

Low risk: more likely to be exploited than 13% of all known CVEs.

References

Exploit1
Other references1

Related Vulnerabilities

Other CWE-440 vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2019-5108Medium6.510%-Fix
CVE-2023-6129Medium6.52.3%-Fix
CVE-2021-41035Critical9.81.7%-Fix
CVE-2018-12550High8.11.4%-Fix
CVE-2019-6569Critical9.11.3%-Fix
CVE-2023-2088Medium6.51.2%-Fix

Common questions

How do I fix CVE-2023-26819?

Published advisories record a fix for 3 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2023-26819 being actively exploited?

Not that we know of. CVE-2023-26819 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.22% is the estimated probability that it will be exploited in the next 30 days. That is higher than 13% of all scored CVEs.

How severe is CVE-2023-26819?

CVE-2023-26819 has a CVSS v3 base score of 2.9, rated low. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2023-26819 affect?

Published advisories record a fix for cjson (Debian), cjson (Ubuntu), libcjson1 (Ubuntu). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-11-03.