HOMEVULNERABILITIESCVE-2022-28366
HIGH

CVE-2022-28366

NVD-CWE-noinfoPublished: April 21, 2022· Updated: Jun 17, 2026

7.5
CVSS v3.1

Official Description

Certain Neko-related HTML parsers allow a denial of service via crafted Processing Instruction (PI) input that causes excessive heap memory consumption. In particular, this issue exists in HtmlUnit-Neko through 2.26, and is fixed in 2.27. This issue also exists in CyberNeko HTML through 1.9.22 (also affecting OWASP AntiSamy before 1.6.6), but 1.9.22 is the last version of CyberNeko HTML. NOTE: this may be related to CVE-2022-24839.

NVD Source

Technical Analysis

CVE-2022-28366 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Vendors & Products

antisamy_project1 product(s)
antisamy
cyberneko_html_project1 product(s)
cyberneko html
htmlunit1 product(s)
htmlunit
Source: NVD CPE · 3 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://github.com/nahsra/antisamy/releases/tag/v1.6.6
ADVISORYhttps://search.maven.org/artifact/net.sourceforge.htmlunit/neko-htmlunit
ADVISORYhttps://sourceforge.net/projects/htmlunit/files/htmlunit/2.27/
ADVISORYhttps://github.com/nahsra/antisamy/releases/tag/v1.6.6
ADVISORYhttps://search.maven.org/artifact/net.sourceforge.htmlunit/neko-htmlunit
ADVISORYhttps://sourceforge.net/projects/htmlunit/files/htmlunit/2.27/

All References (6)

→
https://github.com/nahsra/antisamy/releases/tag/v1.6.6Release Notes · Third Party Advisory
→
https://search.maven.org/artifact/net.sourceforge.htmlunit/neko-htmlunitRelease Notes · Third Party Advisory
→
https://sourceforge.net/projects/htmlunit/files/htmlunit/2.27/Release Notes · Third Party Advisory
→
https://github.com/nahsra/antisamy/releases/tag/v1.6.6Release Notes · Third Party Advisory
→
https://search.maven.org/artifact/net.sourceforge.htmlunit/neko-htmlunitRelease Notes · Third Party Advisory
→
https://sourceforge.net/projects/htmlunit/files/htmlunit/2.27/Release Notes · Third Party Advisory

Quick Facts

CVE IDCVE-2022-28366
CVSS Score7.5 / 10
SeverityHIGH
WeaknessNVD-CWE-noinfo
CISA KEVNo
Affected3 vendor(s)
PublishedApr 21, 2022

Related CVEs (NVD-CWE-noinfo)

CVE-2020-14606
10.0
CVE-2020-1467
10.0
CVE-2020-1953
10.0
CVE-2020-14701
10.0
CVE-2019-1372
10.0
CVE-2021-2177
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2022-28366 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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