What is CVE-2023-42278?

CVE-2023-42278 is a high-severity vulnerability in Hutool, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.5/10. Published 2023-09-08.

How severe is CVE-2023-42278?

High severity. CVSS v3 base score is 7.5 out of 10.

Buffer overflow in Hutool

CVE-2023-42278

hutool v5.8.21 was discovered to contain a buffer overflow via the component JSONUtil.parse().

Vulnerability class: Buffer Overflow

Published 2023-09-08 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.008 (56.1th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 56.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.008 · change: +0.001

Affected products

Hutool — versions 5.8.21

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

github.com/dromara/hutool/issues/3289 (Exploit, Issue Tracking, Vendor Advisory)

Frequently asked questions

What is CVE-2023-42278?: CVE-2023-42278 is a high-severity vulnerability in Hutool, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.5/10. Published 2023-09-08.
How severe is CVE-2023-42278?: High severity. CVSS v3 base score is 7.5 out of 10.