What is CVE-2023-23088?

CVE-2023-23088 is a critical-severity vulnerability in Json-Parser Project, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2023-02-03.

How severe is CVE-2023-23088?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2023-23088 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Json-Parser Project

CVE-2023-23088

Buffer OverFlow Vulnerability in Barenboim json-parser master and v1.1.0 fixed in v1.1.1 allows an attacker to execute arbitrary code via the json_value_parse function.

Vulnerability class: Buffer Overflow

Published 2023-02-03 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.010 (61.6th percentile), scored 2026-10-08.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 62nd percentile — 61.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Json-Parser Project — versions 1.1.0

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

Public proof-of-concept exploits

DiRaltvein/memory-corruption-examples

References

github.com/Barenboim/json-parser/issues/7 (Exploit, Patch, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2023-23088?: CVE-2023-23088 is a critical-severity vulnerability in Json-Parser Project, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2023-02-03.
How severe is CVE-2023-23088?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2023-23088 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.