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CVE-2020-36438

25
FAUCET Score

CVE-2020-36438 describes a vulnerability in the tiny_future Rust crate prior to version 0.4.0, where the Future<T> trait lacks necessary Send and Sync bounds. This flaw carries a high CVSS score of 8.1, indicating a potentially severe impact (confidentiality, integrity, and availability) through a network-based attack with high complexity. Despite its 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
< 0.4.0CPE matchmatch criteria
cpe:2.3:a:tiny_future_project:tiny_future:*:*:*:*:*: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: tiny_futureFixed in: 0.4.0

Vendor Advisories (1)

rustGHSA-fg42-vwxx-xx5jhigh

Data race in tiny_future

Aug 25, 2021

References

raw.githubusercontent.com / rustsec/advisory-db/main/crates/tiny_future/RUSTSEC-2020-0118.md
Third Party Advisory
rustsec.org / advisories/RUSTSEC-2020-0118.html
Third Party Advisory