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CVE-2022-38667

31
FAUCET Score

CVE-2022-38667 is a critical Use-After-Free vulnerability affecting HTTP applications built on Crow through version 1.0+4. This flaw arises from the HTTP parser supporting pipelining while the asynchronous Connection layer is unaware, leading to improper handling of concurrent requests. With a CVSS score of 9.8, this vulnerability allows for remote code execution with low attack complexity and no user interaction required, posing a significant risk to confidentiality, integrity, and availability. Despite its high severity, there is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.0\+4CPE matchmatch criteria
cpe:2.3:a:crowcpp:crow:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.13%
Probability of exploitation in next 30 days
EPSS Percentile
80.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0213 is in the 69th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 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

cwe.mitre.org / data/definitions/372.html
Technical DescriptionThird Party Advisory
github.com / 0xhebi/CVEs/blob/main/Crow/CVE-2022-38667.md
ExploitThird Party Advisory
github.com / CrowCpp/Crow/pull/524
PatchThird Party Advisory
gynvael.coldwind.pl
ExploitThird Party Advisory