Vulnerability · Published Jun 14, 2023 · Assigned by mitre
CVE-2023-34620
High 7.5
In plain English
A high-severity out-of-bounds write in the github.com/hjson/hjson-go package (Go). Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 56% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.8%top 44.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
An issue was discovered hjson thru 3.0.0 allows attackers to cause a denial of service or other unspecified impacts via crafted object that uses cyclic dependencies.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/hjson/hjson-go | no fix listed | GO-2026-5157 |
| Go | github.com/hjson/hjson-go/v4 | 4.5.0 | GO-2026-5157 |
| Go | github.com/hjson/hjson-go/v4 | 4.5.0 | GHSA-5wfc-hjrc-gq87 |
| Maven | org.hjson:hjson | 3.0.1 | GHSA-5wfc-hjrc-gq87 |
| Packagist | laktak/hjson | 2.3.0 | GHSA-5wfc-hjrc-gq87 |
Affected products (as reported)
Weakness: CWE-787 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H