CVE-2020-14326Network attack vector

Remote service interruption via hash-colliding route cache

Published Jun 2, 2021 · Updated Aug 4, 2024

Uncontrolled resource consumption in Red Hat RESTEasy 4.5.5.Final and earlier allows remote attackers to make HTTP endpoints unresponsive. RootNode inserts colliding route keys into an unbounded cache, making each lookup and insertion consume progressively more CPU. No authentication or user interaction is required; repeated requests can stall the affected application without affecting confidentiality or integrity.

CVSS severity7.5
High
EPSS probability1.22%
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 Red Hat RESTEasy 4.5.5.Final and earlier allows remote attackers to make HTTP endpoints unresponsive. RootNode inserts colliding route keys into an unbounded cache, making each lookup and insertion consume progressively more CPU. No authentication or user interaction is required; repeated requests can stall the affected application without affecting confidentiality or integrity.

The record

CVE
CVE-2020-14326
Published
Jun 2, 2021
Updated
Aug 4, 2024
Vendor
Red Hat
Product
RESTEasy
Classifications
CWE-400, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 2, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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?

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

  1. Affected versionversion=RESTEasy 4.5.6.Final

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Red Hat · RESTEasyversion=RESTEasy 4.5.6.Final

Published CVSS scores

5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:N/A:P
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 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
T1499.004Endpoint Denial of Service: Application or System Exploitation

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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