CVE-2023-34620: An issue was discovered hjson thru 3.0.0 allows attackers to cause a denial of service or other unspecified im

Q: How do I fix CVE-2023-34620?

hjson: upgrade to newer than 3.0.0. Exact commands for each OS are on this page.

Q: Is CVE-2023-34620 being exploited?

CVE-2023-34620 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2023-34620 affect?

CVE-2023-34620 affects hjson. Severity is high (CVSS 7.5). 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.

Q: How urgent is CVE-2023-34620?

Priority 50/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 7.5REMOTEUPGRADE

CVE-2023-34620 is a high-severity flaw (CVSS 7.5) affecting hjson. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.8% (top 44%)
CISA exploited list	No
Weakness	CWE-787
Published	2023-06-14
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: hjson project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-06-14 14:15 UTCPublished CVE record published
2026-06-17 06:03 UTCUpdated Record last modified

hjson project hjson UPGRADE

Affected: <= 3.0.0

Fixed in: newer than 3.0.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy hjson || rpm -q hjson || hjson --version

2. UPGRADE to newer than 3.0.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade hjson

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade hjson

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-34620?

hjson: upgrade to newer than 3.0.0. Exact commands for each OS are on this page.

Is CVE-2023-34620 being exploited?

CVE-2023-34620 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-34620 affect?

CVE-2023-34620 affects hjson. Severity is high (CVSS 7.5). 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.

How urgent is CVE-2023-34620?

Priority 50/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2023-39685 HIGH 7.5 UPGRADE An issue in hjson-java up to v3.0.0 allows attackers to cause a Denial of Service (DoS) via supplying a crafte

References

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