CVE-2023-34611Public exploitNetwork attack vector

Service interruption via unbounded recursive JSON parsing

Published Jun 14, 2023 · Updated Jan 6, 2025

Denial of service in mjson 1.4.1 and earlier allows remote attackers to crash parsers by submitting deeply nested JSON arrays. Json.Reader.readArray recursively processes each nested array without enforcing a depth limit, exhausting the Java call stack and raising StackOverflowError. Any network service that passes untrusted JSON to Json.read is exposed, and successful exploitation interrupts parsing and associated service handling.

CVSS severity7.5
High
EPSS probability0.74%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in mjson 1.4.1 and earlier allows remote attackers to crash parsers by submitting deeply nested JSON arrays. Json.Reader.readArray recursively processes each nested array without enforcing a depth limit, exhausting the Java call stack and raising StackOverflowError. Any network service that passes untrusted JSON to Json.read is exposed, and successful exploitation interrupts parsing and associated service handling.

The record

CVE
CVE-2023-34611
Published
Jun 14, 2023
Updated
Jan 6, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 14, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 6, 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

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5NIST NVDCVSS: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
T1499.004Application 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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