CVE-2022-29546

published

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.

Technical severity7.5 highCVSS 3.1 · NVD: [email protected]

Published2022-04-25Source updated 2026-11-02

Collected2026-11-034 attributed sources

Fixes and workarounds

Fix

net.sourceforge.htmlunit:neko-htmlunit (Maven): OSV reports a fixed version 2.61.0. Check the advisory for supported release branches.

Source: OSV GHSA-6jmm-mp6w-4rrg

Affected products and versions

Affected products, source version ranges and reporting authorities
Product	Versions	Authority
n/a n/a	Version not specified (affected)	CNA: mitre
net.sourceforge.htmlunit:neko-htmlunit `net.sourceforge.htmlunit:neko-htmlunit` Maven	2.21 (affected, Maven) 2.23 (affected, Maven) 2.24 (affected, Maven) 2.25 (affected, Maven) 2.27 (affected, Maven) 2.28 (affected, Maven) 2.30 (affected, Maven) 2.31 (affected, Maven) 2.32 (affected, Maven) 2.33 (affected, Maven) 2.34.0 (affected, Maven) 2.35.0 (affected, Maven) 2.36.0 (affected, Maven) 2.37.0 (affected, Maven) 2.38.0 (affected, Maven) 2.39.0 (affected, Maven) 2.40.0 (affected, Maven) 2.41.0 (affected, Maven) 2.42.0 (affected, Maven) 2.43.0 (affected, Maven) 2.44.0 (affected, Maven) 2.45.0 (affected, Maven) 2.46.0 (affected, Maven) 2.47.0 (affected, Maven) 2.47.1 (affected, Maven) 2.48.0 (affected, Maven) 2.49.0 (affected, Maven) 2.50.0 (affected, Maven) 2.51.0 (affected, Maven) 2.52.0 (affected, Maven) 2.53.0 (affected, Maven) 2.54.0 (affected, Maven) 2.55.0 (affected, Maven) 2.56.0 (affected, Maven) 2.57.0 (affected, Maven) 2.58.0 (affected, Maven) 2.59.0 (affected, Maven) 2.60.0 (affected, Maven) Ecosystem version events: introduced 0; fixed 2.61.0 Source events (ECOSYSTEM) `[ { "introduced": "0" }, { "fixed": "2.61.0" } ]` Other versions: unaffected	OSV GHSA-6jmm-mp6w-4rrg

Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.

NVD applicability configurations (1)

These expressions retain AND/OR operators, negation, and required environmental products. A listed product is not sufficient to establish exposure when additional conditions apply.

[
  {
    "negate": false,
    "nodes": [
      {
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:a:htmlunit:htmlunit:*:*:*:*:*:*:*:*",
            "versionEndExcluding": "2.61.0",
            "vulnerable": true
          }
        ],
        "negate": false,
        "operator": "OR"
      }
    ],
    "operator": "OR"
  }
]

CVSS assessments

CVSS scores, vectors and reporting authorities
Version / score	Vector	Authority
3.1 / 7.5 high	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`	NVD: [email protected]
2.0 / 5.0 medium	`AV:N/AC:L/Au:N/C:N/I:N/A:P`	NVD: [email protected]

Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

References

https://github.com/HtmlUnit/htmlunit-neko/security/advisories/GHSA-6jmm-mp6w-4rrgCNA: mitre · x_refsource_CONFIRM
https://github.com/HtmlUnit/htmlunit-neko/security/advisories/GHSA-6jmm-mp6w-4rrgADP: CVE · x_refsource_CONFIRM, x_transferred
https://github.com/HtmlUnit/htmlunit-neko/security/advisories/GHSA-6jmm-mp6w-4rrg[email protected] · Third Party Advisory
https://github.com/HtmlUnit/htmlunit-neko/security/advisories/GHSA-6jmm-mp6w-4rrgaf854a3a-2127-422b-91ae-364da2661108 · Third Party Advisory
https://github.com/advisories/GHSA-6jmm-mp6w-4rrgOSV / GitHub Security Advisories · advisory
https://osv.dev/vulnerability/GHSA-6jmm-mp6w-4rrgOSV / GitHub Security Advisories · osv

Prioritization

CISA known exploited vulnerabilities

No KEV listing in collected sources. This does not establish that exploitation is absent.

EPSS

1.23% estimated probability of exploitation in the next 30 days; percentile 68.97.
Assessed 2026-11-02 by FIRST.

SSVC

Exploitation: none
Automatable: no
Technical impact: partial

ADP: CISA-ADP · 2026-11-02

Provenance

CNA: mitre
Source updated 2026-11-02
Retrieved 2026-11-02

NVD
Source updated 2026-11-02
Retrieved 2026-11-03

OSV / GitHub Security Advisories
Source updated 2026-07-08
Retrieved 2026-11-02

FIRST EPSS
Source updated Not reported
Retrieved 2026-11-02

Disclosure revision
edc7aa525f3a0aa7c5033d1f30c951bd94a87309c51e02e50e0a27888770607d

Sharing this public URL includes a card for this disclosure revision.

Download card

For agents and automation

Read public disclosures for free as Markdown or JSON. Compatible browsers also expose native WebMCP tools to search disclosures, read this page, and discover API access.

Use the ontology-linked Cyber API with x402 pay per request, or a Y2 Pro or Elite API key with the intel:cyber scope.

Get an API key Use x402 Connect an agent

Endpoints and access details

https://api.y2.dev/api/v2/cyber/cves
https://api.y2.dev/api/v2/cyber/cves/{cveId}

A workspace owner or admin can create a Pro or Elite API key. Send Authorization: Bearer <Y2_API_KEY> from your trusted agent runtime.

For x402, omit Authorization and read the HTTP 402 payment challenge before signing a retry. Public browser tools do not make payments.

Agent access JSON · OpenAPI · CVE API guide