CVE-2022-42003Network attack vector

Denial of service via recursive array unwrapping

Published Oct 2, 2022 · Updated Aug 3, 2024

Resource exhaustion in FasterXML jackson-databind 2.4.0-rc1 through 2.12.7 and 2.13.0 through 2.13.4.1 allows attackers to interrupt service. StdDeserializer primitive parsers recursively unwrap nested arrays without rejecting a second START_ARRAY token, allowing crafted JSON to consume stack resources. Exploitation requires untrusted JSON to reach an affected primitive deserializer while UNWRAP_SINGLE_VALUE_ARRAYS is enabled; the resulting exhaustion interrupts the consuming application.

CVSS severity7.5
High
EPSS probability2.78%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in FasterXML jackson-databind 2.4.0-rc1 through 2.12.7 and 2.13.0 through 2.13.4.1 allows attackers to interrupt service. StdDeserializer primitive parsers recursively unwrap nested arrays without rejecting a second START_ARRAY token, allowing crafted JSON to consume stack resources. Exploitation requires untrusted JSON to reach an affected primitive deserializer while UNWRAP_SINGLE_VALUE_ARRAYS is enabled; the resulting exhaustion interrupts the consuming application.

The record

CVE
CVE-2022-42003
Published
Oct 2, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-400, CWE-502, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 2, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record 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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
CWE-502Deserialization of Untrusted Data
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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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