CVE-2023-34616Public exploitNetwork attack vector

Application crash via unbounded recursive JSON parsing

Published Jun 14, 2023 · Updated Jan 3, 2025

Stack exhaustion in pbjson 0.4.0 and earlier allows remote attackers to crash applications by submitting deeply nested JSON input. JSONObjectReader.readJSON sends deeply nested arrays through GetJSONArray and GetJSONValueRecursive without limiting recursion depth. Exploitation requires an application to parse attacker-supplied JSON; exhausting the Java stack crashes that application or its parsing process.

CVSS severity7.5
High
EPSS probability0.73%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack exhaustion in pbjson 0.4.0 and earlier allows remote attackers to crash applications by submitting deeply nested JSON input. JSONObjectReader.readJSON sends deeply nested arrays through GetJSONArray and GetJSONValueRecursive without limiting recursion depth. Exploitation requires an application to parse attacker-supplied JSON; exhausting the Java stack crashes that application or its parsing process.

The record

CVE
CVE-2023-34616
Published
Jun 14, 2023
Updated
Jan 3, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, CWE-400, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 14, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 3, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
CWE-400Uncontrolled Resource Consumption
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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