Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2018-20993

23
FAUCET Score

CVE-2018-20993 describes an uncontrolled recursion vulnerability in the yaml-rust crate prior to version 0.4.1, affecting applications that use this Rust library for YAML deserialization. This flaw allows an unauthenticated attacker to trigger a denial-of-service condition due to the recursive processing. While rated as High severity (CVSS 7.5) with low attack complexity, there is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.4.1CPE matchmatch criteria
cpe:2.3:a:yaml-rust_project:yaml-rust:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

CVSS:3.0/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
3.0

Exploit Intelligence

EPSS Score
1.41%
Probability of exploitation in next 30 days
EPSS Percentile
69.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0141 is in the 51st percentile among its peer group of 51,455 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: yaml-rustFixed in: 0.4.1

Vendor Advisories (1)

rustGHSA-hv87-47h9-jcvqhigh

Uncontrolled recursion in rust-yaml

Aug 25, 2021

References

rustsec.org / advisories/RUSTSEC-2018-0006.html
PatchThird Party Advisory