CVE-2022-21628Network attack vector

Denial of service via unbounded HTTP connections

Published Oct 18, 2022 · Updated Feb 13, 2025

Denial of service in Oracle Java SE 19's Lightweight HTTP Server allows remote attackers to interrupt network communication via HTTP. The server accepts HTTP client connections without enforcing a connection-count limit, allowing concurrent malicious clients to exhaust networking resources. Exploitation requires an HTTP-reachable deployment that loads untrusted code and relies on the Java sandbox; trusted-code-only server deployments are excluded.

CVSS severity5.3
Medium
EPSS probability2.26%
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 Oracle Java SE 19's Lightweight HTTP Server allows remote attackers to interrupt network communication via HTTP. The server accepts HTTP client connections without enforcing a connection-count limit, allowing concurrent malicious clients to exhaust networking resources. Exploitation requires an HTTP-reachable deployment that loads untrusted code and relies on the Java sandbox; trusted-code-only server deployments are excluded.

The record

CVE
CVE-2022-21628
Published
Oct 18, 2022
Updated
Feb 13, 2025
Vendor
Oracle Corporation
Product
Java Platform, Standard Edition (Java SE)
Classifications
T1499.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 18, 2022CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 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=Oracle GraalVM Enterprise Edition:20.3.7
  2. Affected versionversion=Oracle GraalVM Enterprise Edition:21.3.3
  3. Affected versionversion=Oracle GraalVM Enterprise Edition:22.2.0
  4. Affected versionversion=Oracle Java SE:11.0.16.1
  5. Affected versionversion=Oracle Java SE:17.0.4.1
  6. Affected versionversion=Oracle Java SE:19
  7. Affected versionversion=Oracle Java SE:8u341
  8. Affected versionversion=Oracle Java SE:8u345-perf

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Oracle Corporation · Java Platform, Standard Edition (Java SE)version=Oracle GraalVM Enterprise Edition:20.3.7; version=Oracle GraalVM Enterprise Edition:21.3.3; version=Oracle GraalVM Enterprise Edition:22.2.0; version=Oracle Java SE:11.0.16.1; version=Oracle Java SE:17.0.4.1; version=Oracle Java SE:19; version=Oracle Java SE:8u341; version=Oracle Java SE:8u345-perf

Published CVSS scores

5.3Oracle CorporationCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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 exploitUnconfirmed

Weakness, pattern, technique

T1499.003Application Exhaustion Flood

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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