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Vulnerabilities

Vulnerability · CVE-2023-53154

parse_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 called.

Published May 23, 2025 · catalog updated Nov 3, 2025 · cJSON project cJSON

Check this week

CVE-2023-53154 is not in CISA KEV. FIRST estimates a 27.00% chance of exploitation in the next 30 days. Check whether you run cJSON project cJSON.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Low2.9
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
27.00%
Remediation
Version ranges on file
Affected products
vendor cJSON project cJSON 0 <1.7.18

parse_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 called.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor cJSON project cJSON 0 <1.7.180 <1.7.18

How to fix CVE-2023-53154

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2023-53154 is not in CISA KEV. FIRST estimates a 27.00% chance of exploitation in the next 30 days. Check whether you run cJSON project cJSON.

Which versions are affected?

Compare what you have installed with cJSON project cJSON 0 <1.7.18 0 <1.7.18. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 27.00%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. May 23, 2025 · EUVD

    Detected

    parse_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 called.

  2. Nov 3, 2025 · EUVD

    Updated

    parse_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 called.

Sources

  • CVE.orgVulnerability recordCVE-2023-53154

    Official CVE identifier

    cve.org
  • EUVDVulnerability recordEUVD-2023-59777

    parse_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 called.

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.