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CVE-2020-36442

25
FAUCET Score

CVE-2020-36442 is a high-severity vulnerability affecting the beef crate for Rust, specifically versions prior to 0.5.0, where the beef::Cow type lacks a Sync bound on its Send trait. This flaw presents a high attack complexity but allows for network-based exploitation without user interaction, potentially leading to high impact on confidentiality, integrity, and availability. Despite its critical CVSS score of 8.1, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.5.0CPE matchmatch criteria
cpe:2.3:a:beef_project:beef:*:*:*:*:*:rust:*:*

CVSS Data

CVSS version used by this source: 3.1

8.1HIGH

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.77%
Probability of exploitation in next 30 days
EPSS Percentile
51.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0077 is in the 20th percentile among its peer group of 8,920 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 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)

rustpatch availablevia ghsa
Product: beefFixed in: 0.5.0

Vendor Advisories (1)

rustGHSA-m7w4-8wp8-m2xqhigh

Data races in beef

Aug 25, 2021

References

raw.githubusercontent.com / rustsec/advisory-db/main/crates/beef/RUSTSEC-2020-0122.md
Third Party Advisory
rustsec.org / advisories/RUSTSEC-2020-0122.html
Third Party Advisory