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CVE-2022-28366

Denial of service in HtmlUnit-Neko

7.5 HighFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

2.18%Up 1.3 points since Apr 22, 2022
90%50%10%1%

What each source reports

NVD Score used 7.5

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.

Record
CVE-2022-28366
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0
5.0 MediumAV:N/AC:L/Au:N/C:N/I:N/A:P
Updated
2026-11-02
CVE List No score

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.

Record
CVE-2022-28366
Updated
2026-11-02
EUVDEUVD-2022-1739 No score

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.

Record
EUVD-2022-1739
Updated
2026-11-03
GitHub AdvisoriesGHSA-g9hh-vvx3-v37v 7.5

Denial of service in HtmlUnit-Neko

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-2022-24939.

Record
GHSA-g9hh-vvx3-v37v
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2022-28366 7.5

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.

Record
DEBIAN-CVE-2022-28366
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-03
OSVGHSA-g9hh-vvx3-v37v 7.5

Denial of service in HtmlUnit-Neko

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-2022-24939.

Record
GHSA-g9hh-vvx3-v37v
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2022-28366 7.5

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.

Record
UBUNTU-CVE-2022-28366
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSV No score

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.

Record
CVE-2022-28366
Updated
2026-11-02
OSVopenSUSE-SU-2024:12022-1 No score

nekohtml-1.9.22.noko2-1.1 on GA media

These are all security issues fixed in the nekohtml-1.9.22.noko2-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:12022-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
net.sourceforge.htmlunit:neko-htmlunit
Maven
 before 2.27
2.27
libowasp-antisamy-java
Debian:12
 All versions, plus listed versions
1.5.3+dfsg-1.11.7.4-11.7.8-1
 None known
libowasp-antisamy-java
Debian:13
 before 1.7.4-1
1.7.4-1
libowasp-antisamy-java
Debian:14
 before 1.7.4-1
1.7.4-1
net.sourceforge.htmlunit:neko-htmlunit
Maven
 before 2.27, plus listed versions
2.212.232.242.25
2.27
libowasp-antisamy-java
Ubuntu:16.04:LTS
 All versions, plus listed versions
1.5.3+dfsg-1
 None known
libowasp-antisamy-java
Ubuntu:18.04:LTS
 All versions, plus listed versions
1.5.3+dfsg-1
 None known
libowasp-antisamy-java
Ubuntu:20.04:LTS
 All versions, plus listed versions
1.5.3+dfsg-1
 None known
libowasp-antisamy-java
Ubuntu:22.04:LTS
 All versions, plus listed versions
1.5.3+dfsg-1.1
 None known
libowasp-antisamy-java
Ubuntu:24.04:LTS
 All versions, plus listed versions
1.5.3+dfsg-1.11.7.4-1
 None known
libowasp-antisamy-java
Ubuntu:25.10
 All versions, plus listed versions
1.7.4-1
 None known
libowasp-antisamy-java
Ubuntu:26.10
 All versions, plus listed versions
1.7.4-1
 None known
libowasp-antisamy-java
Ubuntu:26.04:LTS
 All versions, plus listed versions
1.7.4-1
 None known

History

History
RecordedChangedSources
affectedOSV
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2022-28366 is a high vulnerability (CVSS 7.5) in Antisamy Project Antisamy, published April 21, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.18%, the 82nd percentile. Fixed in net.sourceforge.htmlunit:neko-htmlunit 2.27.

References

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