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NVD / CVE Program· CNA mitre

CVE-2023-26819: cJSON 1.7.15 might allow a denial of service via a crafted JSON document such as {"a": true, "b"…

Noroxi assessment

Priority: Monitor (action score 11/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.23% (FIRST EPSS).
  • Someone with local access to the system can trigger it. No account or password is required. No user action is required. Special conditions such as timing or configuration are required.
  • Fixed version: azl3 ceph 18.2.2-13 on Azure Linux 3.0 Release Notes; azl3 libglvnd 1.7.0-3 on Azure Linux 3.0 1.7.0-3.

Low priority for now. Upgrade to azl3 ceph 18.2.2-13 on Azure Linux 3.0 Release Notes; azl3 libglvnd 1.7.0-3 on Azure Linux 3.0 1.7.0-3 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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

LowCVSS 2.9 · v3.1—No exploit Fix available
Published
Apr 19, 2025
Updated
Jun 17, 2026
EPSS
0.2% · 14th percentile

Report tools

JSON

Action score

11

Monitor

Low priority for now.

CVSS
11 / 40 · 2.9 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CISA SSVC decision

Exploitation
proof of concept
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · mitre
2.9
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2023-26819

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
cjson projectcjson

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • cjson project cjson1.7.15

Versions reported by the vendor

Affected version ranges reported by the assigning authority (mitre). Independent of NVD's CPE analysis and usually ahead of it.

  • cJSON Project cJSON

    • 1.7.15affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:11cjsonbefore 1.7.14-1+deb11u21.7.14-1+deb11u2
Debian:12cjsonbefore 1.7.15-1+deb12u31.7.15-1+deb12u3
Debian:13cjsonbefore 1.7.18-3.11.7.18-3.1
openSUSE:Leap 16.0cJSONbefore 1.7.19-160000.1.11.7.19-160000.1.1
openSUSE:TumbleweedcJSONbefore 1.7.19-1.11.7.19-1.1
SUSE:Linux Enterprise Workstation Extension 15 SP7cJSONbefore 1.7.19-150700.3.3.11.7.19-150700.3.3.1

Same product

cjson project: all records

Other highest-scoring records for the same primary product.

  • CVE-2024-31755cJSON v1.7.17 was discovered to contain a segmentation violation, which can trigger through the second parameter of function…
    30Monitor
  • CVE-2023-53154parse_string in cJSON before 1.7.18 has a heap-based buffer over-read via {"1":1, with no trailing newline if cJSON_ParseWithLength is…
    22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
azl3 ceph 18.2.2-12 on Azure Linux 3.0—Microsoft (MSRC)
azl3 ceph 18.2.2-13 on Azure Linux 3.0Release NotesMicrosoft (MSRC)
azl3 libglvnd 1.7.0-3 on Azure Linux 3.01.7.0-3 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:cjson1.7.15-1+deb12u3 · Debian:12Package registry (OSV)
opensuse:cJSON1.7.19-1.1 · openSUSE:TumbleweedPackage registry (OSV)
suse:cJSON1.7.19-150700.3.3.1 · SUSE:Linux Enterprise Workstation Extension 15 SP7Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • No account or password is required.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
none
Integrity
none
Availability
low · the service can be disrupted
Attack vector
Local
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
Low

Weakness class (CWE)

CWE-440 · Expected Behavior Violation

CVSS vector

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

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records