Vulnerabilities in pkg:golang/github.com/hjson/hjson-go/v4

PACKAGE
Advisory Identifier: GHSA-5wfc-hjrc-gq87
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Advisory Summary

CVE-2023-34620 is a HIGH (CVSS 7.5) hjson stack exhaustion vulnerability vulnerability (CWE-400: Uncontrolled Resource Consumption) affecting Hjson libraries in the Maven ecosystem. The issue involves hjson stack exhaustion vulnerability. Remediation is available by upgrading affected packages to version 3.0.1, 2.3.0, 4.5.0.

1 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:golang/github.com/hjson/hjson-go/v4

1 Known Advisory Record(s)

Vulnerability advisories affecting package pkg:golang/github.com/hjson/hjson-go/v4. Select an advisory below to view technical details or fixes.

Advisory ID CVE / NVD Severity Summary
GHSA-5wfc-hjrc-gq87 CVE-2023-34620 HIGH hjson stack exhaustion vulnerability

CVE-2023-34620 at a Glance

CVE Identifier CVE-2023-34620
GHSA Identifier GHSA-5wfc-hjrc-gq87
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-400: Uncontrolled Resource Consumption
Affected Product Hjson
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2023-34620

To remediate this vulnerability, upgrade all affected Hjson dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

org.hjson:hjson fixed: 3.0.1 
<dependency>
    <groupId>org.hjson</groupId>
    <artifactId>hjson</artifactId>
    <version>3.0.1</version>
</dependency>
laktak/hjson fixed: 2.3.0 
Upgrade laktak/hjson to 2.3.0
github.com/hjson/hjson-go/v4 fixed: 4.5.0 
Upgrade github.com/hjson/hjson-go/v4 to 4.5.0
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree -Dincludes=org.hjson

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2023-34620, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=org.hjson

Analyze the terminal output to locate any version of Hjson in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3.0.1), your application is affected.

Note: The mvn dependency:tree -Dincludes=org.hjson command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-400: Uncontrolled Resource Consumption, where the product does not properly control the allocation and maintenance of a limited resource. In Hjson, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

An issue was discovered hjson through 3.0.0 allows attackers to cause a denial of service or other unspecified impacts via crafted objects that deeply nested structures.

CVE-2023-34620 Affected Hjson Versions

3 component(s)
Fixed Versions:
3.0.12.3.04.5.0
Product / Package Ecosystem Affected Versions Fixed Version
org.hjson:hjson
maven/org.hjson/hjson
Maven
< 3.0.1
3.0.1
laktak/hjson
 Packagist
< 2.3.0
2.3.0
github.com/hjson/hjson-go/v4
golang/github.com/hjson/hjson-go/v4
Go
< 4.5.0
4.5.0

References

NVD — CVE-2023-34620 NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-34620
Hjson Source Repository REPOSITORY
https://github.com/hjson/hjson-java/issues/24
Hjson Source Repository REPOSITORY
https://github.com/hjson/hjson-cpp/pull/54
Hjson Source Repository REPOSITORY
https://github.com/hjson/hjson-go/pull/67
Hjson Source Repository REPOSITORY
https://github.com/hjson/hjson-php/pull/45
Security Fix Commit FIX COMMIT
https://github.com/hjson/hjson-go/commit/326599cebc6ef759892f473bf1439b98466a99fa
Security Fix Commit FIX COMMIT
https://github.com/hjson/hjson-php/commit/2d1b8b4b158a8d841f3a228f267c7cd84fe5a4fa

Frequently Asked Questions

What is CVE-2023-34620?
CVE-2023-34620 is a security vulnerability in Hjson involving hjson stack exhaustion vulnerability under CWE-400: Uncontrolled Resource Consumption.
Which Hjson versions are affected?
Affected versions include releases prior to 3.0.1, 2.3.0, 4.5.0 across affected packages: org.hjson:hjson, laktak/hjson, github.com/hjson/hjson-go/v4.
What version fixes CVE-2023-34620?
Upgrading to 3.0.1, 2.3.0, 4.5.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is hjson affected?
Yes, org.hjson:hjson is affected in releases prior to 3.0.1. Upgrade your dependency to 3.0.1 or later.
Is laktak/hjson affected?
Yes, laktak/hjson is affected in releases prior to 2.3.0. Upgrade your dependency to 2.3.0 or later.
What is the CVSS score of CVE-2023-34620?
CVE-2023-34620 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2023-34620?
CVE-2023-34620 is classified under CWE-400: Uncontrolled Resource Consumption (The product does not properly control the allocation and maintenance of a limited resource.).
How can I check Maven dependencies for CVE-2023-34620?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=org.hjson'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-5wfc-hjrc-gq87",
  "modified" : "2026-05-20T22:35:10Z",
  "published" : "2023-06-14T15:30:38Z",
  "aliases" : [ "CVE-2023-34620" ],
  "summary" : "hjson stack exhaustion vulnerability",
  "details" : "An issue was discovered hjson through 3.0.0 allows attackers to cause a denial of service or other unspecified impacts via crafted objects that deeply nested structures.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.hjson:hjson"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "3.0.1"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 3.0.0"
    }
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "laktak/hjson"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.3.0"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/hjson/hjson-go/v4"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "4.5.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-34620"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/hjson/hjson-java/issues/24"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/hjson/hjson-cpp/pull/54"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/hjson/hjson-go/pull/67"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/hjson/hjson-php/pull/45"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/hjson/hjson-go/commit/326599cebc6ef759892f473bf1439b98466a99fa"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/hjson/hjson-php/commit/2d1b8b4b158a8d841f3a228f267c7cd84fe5a4fa"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-400", "CWE-674", "CWE-787" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-06-14T20:38:48Z",
    "nvd_published_at" : "2023-06-14T14:15:10Z"
  }
}