Certain Neko-related HTML parsers allow a denial of service via crafted Processing Instruction (PI) input that causes excessive heap memory consumption
Published Apr 21, 2022
7.5
HIGHCVSS 3.1
EPSS 2.13%
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.
Affected products
No data.
Configuration 1
- ≤ 1.9.22
- < 2.27
Configuration 2
- < 1.6.6
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (15 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.13% (0.02125) | 81.23th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.97% (0.01967) | 77.72th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.09% (0.00093) | 24.17th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.15% (0.00150) | 52.61th | v3 (v2023.03.01) |
| Dec 11, 2023 | 0.11% (0.00109) | 43.35th | v3 (v2023.03.01) |
| Nov 27, 2023 | 0.10% (0.00103) | 41.75th | v3 (v2023.03.01) |
| Oct 2, 2023 | 0.10% (0.00097) | 40.05th | v3 (v2023.03.01) |
| May 24, 2023 | 0.09% (0.00088) | 36.31th | v3 (v2023.03.01) |
| Apr 28, 2023 | 0.08% (0.00078) | 31.81th | v3 (v2023.03.01) |
| Mar 22, 2023 | 0.06% (0.00058) | 22.53th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.05% (0.00049) | 15.55th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.95% (0.00954) | 36.37th | v2 (v2022.01.01) |
| Oct 12, 2022 | 0.95% (0.00954) | 34.93th | v2 (v2022.01.01) |
| May 5, 2022 | 0.95% (0.00954) | 32.90th | v2 (v2022.01.01) |
| Apr 22, 2022 | 0.89% (0.00890) | 26.92th | v2 (v2022.01.01) |
No CWE recorded.
References (5)
- https://github.com/advisories/GHSA-g9hh-vvx3-v37v Advisory
- https://github.com/nahsra/antisamy/releases/tag/v1.6.6 x_refsource_MISCRelease NotesThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2022-28366
- https://search.maven.org/artifact/net.sourceforge.htmlunit/neko-htmlunit x_refsource_MISCRelease NotesThird Party Advisory
- https://sourceforge.net/projects/htmlunit/files/htmlunit/2.27/ x_refsource_MISCRelease NotesThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| https://github.com/advisories/GHSA-g9hh-vvx3-v37v | Advisory | |
| https://github.com/nahsra/antisamy/releases/tag/v1.6.6 | x_refsource_MISCRelease NotesThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2022-28366 | ||
| https://search.maven.org/artifact/net.sourceforge.htmlunit/neko-htmlunit | x_refsource_MISCRelease NotesThird Party Advisory | |
| https://sourceforge.net/projects/htmlunit/files/htmlunit/2.27/ | x_refsource_MISCRelease NotesThird Party Advisory |
Change history (0)
No recorded changes yet.