Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2022-4066

27
FAUCET Score

CVE-2022-4066 is a resource allocation vulnerability (CWE-404) in the davidmoreno onion project, specifically within the onion_response_flush function in src/onion/response.c. This issue affects mozilla firefox, mozilla onion, onion_project firefox, and onion_project onion. It carries a high CVSS score of 8.2, indicating a network-based attack with low complexity that can lead to high availability impact and low integrity impact. While a patch (de8ea938342b36c28024fd8393ebc27b8442a161) is available, there is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:-:*:*:*:*:*:*:*
< 2022-09-05CPE matchmatch criteria
cpe:2.3:a:onion_project:onion:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

3.5LOW

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

Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
2.1
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.06%
Probability of exploitation in next 30 days
EPSS Percentile
60.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0106 is in the 38th percentile among its peer group of 51,485 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

No media coverage found for this CVE.

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)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / davidmoreno/onion/commit/de8ea938342b36c28024fd8393ebc27b8442a161
PatchThird Party Advisory
github.com / davidmoreno/onion/pull/308
ExploitPatchThird Party Advisory
vuldb.com
Third Party Advisory