Is CVE-2023-26819 in the CISA KEV catalog?

No. CVE-2023-26819 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2023-26819?

CVE-2023-26819 has a CVSS v3 base score of 2.9 (LOW).

What is the EPSS score for CVE-2023-26819?

CVE-2023-26819 has an EPSS score of 0.20% (9th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-26819?

Upgrade cjson on debian 11 to 1.7.14-1+deb11u2 or later. Fixes are available for 3 affected products.

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

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

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

0.20%probability of exploitation in 30 days

9thpercentile

Low risk: more likely to be exploited than 9% of all known CVEs.

References

Exploit1

github.com

Other references1

lists.debian.org

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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.