Description
HtmlUnit NekoHtml Parser before 2.61.0 suffers from a denial of service vulnerability. Crafted input associated with the parsing of Processing Instruction (PI) data leads to heap memory consumption. This is similar to CVE-2022-28366 but affects a much later version of the product.
Affected products
htmlunit: htmlunit
References2
- github.com/HtmlUnit/htmlunit-neko/security/advisories/GHSA-6jmm… Third Party Advisory
- github.com/HtmlUnit/htmlunit-neko/security/advisories/GHSA-6jmm… Third Party Advisory
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 1% percentile: 69 · as of 5 November 2026
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.