CVE-2022-21700Network attack vector

Service interruption via static conversion-context retention

Published Jan 18, 2022 · Updated Apr 23, 2025

Uncontrolled resource consumption in Micronaut Core before 3.2.7 allows remote attackers to exhaust memory with invalid Content-Type headers. DefaultArgumentConversionContext is erroneously reused in static conversion state, causing invalid media-type conversion data to remain reachable. Any unauthenticated client that can reach a Micronaut HTTP endpoint can repeat malformed headers until heap pressure interrupts the service.

CVSS severity5.3
Medium
EPSS probability1.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled resource consumption in Micronaut Core before 3.2.7 allows remote attackers to exhaust memory with invalid Content-Type headers. DefaultArgumentConversionContext is erroneously reused in static conversion state, causing invalid media-type conversion data to remain reachable. Any unauthenticated client that can reach a Micronaut HTTP endpoint can repeat malformed headers until heap pressure interrupts the service.

The record

CVE
CVE-2022-21700
Published
Jan 18, 2022
Updated
Apr 23, 2025
Vendor
Micronaut Foundation
Product
Micronaut Core
Classifications
CWE-400, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 18, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 3.2.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Micronaut Foundation · Micronaut Coreversion=< 3.2.7

Published CVSS scores

5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:N/A:P
5.3GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

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
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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