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CVE-2020-36443

29
FAUCET Score

CVE-2020-36443 is a critical vulnerability affecting the libp2p-deflate crate in Rust, specifically versions prior to 0.27.1, where an uninitialized buffer is passed to a user-provided trait function. This flaw carries a CVSS score of 9.8 (Critical), indicating it can be exploited remotely with low complexity, leading to complete compromise of confidentiality, integrity, and availability. Currently, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.27.1CPE matchmatch criteria
cpe:2.3:a:libp2p:libp2p-deflate:*:*:*:*:*:rust:*:*

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
1.23%
Probability of exploitation in next 30 days
EPSS Percentile
65.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0123 is in the 52nd percentile among its peer group of 36,897 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)

rustpatch availablevia ghsa
Product: libp2p-deflateFixed in: 0.27.1

Vendor Advisories (1)

rustGHSA-gvcp-948f-8f2pcritical

Use of Uninitialized Resource in libp2p-deflate

Aug 25, 2021

References

raw.githubusercontent.com / rustsec/advisory-db/main/crates/libp2p-deflate/RUSTSEC-2020-0123.md
Third Party Advisory
rustsec.org / advisories/RUSTSEC-2020-0123.html
Third Party Advisory