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-2026-5223

29
FAUCET Score

Cargo incorrectly handled symlinks inside of crate tarballs downloaded from third-party registries, allowing a malicious crate to override the source code of another crate from the same registry. The severity of the vulnerability is **medium** for users of third-party registries. Users of crates.io are **not affected**, as crates.io forbids uploading crates containing any symlink.

First published: May 25, 2026Last modified: May 25, 2026

Impacted Technologies

VendorProductVersion(s)CPE
< 1.96.0CPE matchmatch criteria
cpe:2.3:a:rust-lang:cargo:*:*:*:*:*:rust:*:*

CVSS Data

CVSS version used by this source: 4.0

6.5MEDIUM

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
PASSIVE
VS Confidentiality
NONE
VS Integrity
LOW
VS Availability
NONE
SS Confidentiality
HIGH
SS Integrity
HIGH
SS Availability
HIGH
Exploit Maturity
NOT_DEFINED
CvssVersion
4.0

Exploit Intelligence

EPSS Score
0.29%
Probability of exploitation in next 30 days
EPSS Percentile
21.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0029 is in the 11th percentile among its peer group of 23,701 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (6)

github_advisorypatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: 21433-17084Fixed in: 1.90.0-9
microsoftpatch availablevia msrc
Product: 21400-17084Fixed in: 1.75.0-30
microsoftpatch availablevia msrc
Product: azl3 rust 1.90.0-8 on Azure Linux 3.0Fixed in: 1.90.0-9
microsoftpatch availablevia msrc
Product: azl3 rust 1.75.0-29 on Azure Linux 3.0Fixed in: 1.75.0-30
rustpatch availablevia ghsa
Product: cargoFixed in: 0.97.0

Vendor Advisories (2)

rustGHSA-jq42-7mfv-hm57medium

Cargo crates in third party registries can override the cached source of other crates

Jun 26, 2026
microsoft2026-May/CVE-2026-5223Low

Crates in third party registries can override the cached source of other crates

May 12, 2026

References

blog.rust-lang.org / 2026/05/25/cve-2026-5223
MitigationVendor Advisory
github.com / rust-lang/cargo/pull/17031
Issue TrackingPatch
groups.google.com / g/rustlang-security-announcements/c/IB74S7Yksg8
Mailing ListThird Party Advisory