CVE-2023-34620: github.com/hjson/hjson-go/v4 fixed in 4.5.0

CVE-2023-34620 PUBLISHED CVSS 7.5 HIGH

hjson stack exhaustion vulnerability

Record from NVD · Published June 14, 2023

github.com/hjson/hjson-go/v4 is fixed in 4.5.0 (Go Modules)

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.

EPSS 0.78% · 55.9th percentile

Fixed versions

Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.

Package	Ecosystem	Fixed in
github.com/hjson/hjson-go/v4	Go Modules	4.5.0
org.hjson:hjson	Maven Central	3.0.0

Risk scores

CVSS 3.1

7.5

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

EPSS Score

0.78%

55.9th percentile

Affected products

Vendor	Product	Versions
hjson_project	hjson	0

Timeline

Jun 14, 2023 CVE Published
Jun 15, 2023 EPSS Score (30 in total, the first dated here)
Jan 3, 2025 CVE Updated
Mar 17, 2026 Security Advisory
Aug 8, 2026 Coalition ESS Score

Query this with the API

The same record, from the CLI:

vulnetix vdb vuln CVE-2023-34620
vulnetix vdb fixes CVE-2023-34620

Or with curl, using the org id and key from your account page:

curl -s -H "Authorization: ApiKey ${VULNETIX_ORG_ID}:${VULNETIX_API_KEY}" \
  "https://api.vdb.vulnetix.com/v2/vuln/CVE-2023-34620/fixes/registry"

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References

https://github.com/hjson/hjson-java/issues/24 discussion

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