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CVE-2022-29546

25
FAUCET Score

CVE-2022-29546 is a denial-of-service vulnerability affecting HtmlUnit NekoHtml Parser versions prior to 2.61.0. Specifically, crafted input related to Processing Instruction (PI) data parsing can lead to excessive heap memory consumption. This vulnerability has a CVSS score of 7.5 (High), indicating it can be exploited remotely without user interaction to cause a complete denial of service. While there is no known active exploitation or public exploit code, the vulnerability has garnered some community discussion and media coverage, including a mention in an article about Atlassian patches.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.61.0CPE matchmatch criteria
cpe:2.3:a:htmlunit:htmlunit:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.22%
Probability of exploitation in next 30 days
EPSS Percentile
65.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0122 is in the 44th percentile among its peer group of 51,455 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

mavenpatch availablevia ghsa
Product: net.sourceforge.htmlunit:neko-htmlunitFixed in: 2.61.0

Vendor Advisories (1)

mavenGHSA-6jmm-mp6w-4rrghigh

OutOfMemory Exception by specifically crafted processing instruction in NekoHtml Parser

Apr 26, 2022

References

github.com / HtmlUnit/htmlunit-neko/security/advisories/GHSA-6jmm-mp6w-4rrg
Third Party Advisory