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CVE-2020-35864

22
FAUCET Score

CVE-2020-35864 is a high-severity vulnerability affecting the flatbuffers Rust crate up to version 2020-04-11, where the read_scalar and read_scalar_at functions can perform unsafe type transmutations without requiring explicit unsafe blocks. This network-exploitable flaw has a CVSS score of 7.5, indicating a high impact on availability, though confidentiality and integrity are not directly affected. There is currently no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
>= 0.4.0, <= 1.12.0CPE matchmatch criteria
cpe:2.3:a:google:flatbuffers:*:*:*:*:*:rust:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.58%
Probability of exploitation in next 30 days
EPSS Percentile
44.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0058 is in the 21st 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)

rustpatch availablevia ghsa
Product: flatbuffersFixed in: 2.0.0

Vendor Advisories (1)

rustGHSA-c9h5-hf8r-m97xhigh

Dangling reference in flatbuffers

Aug 25, 2021

References

rustsec.org / advisories/RUSTSEC-2020-0009.html
ExploitThird Party Advisory