CVE-2026-5223

EUVD-2026-31658
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.
Symlink
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
5.3 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 21%
Affected Products (NVD)
VendorProductVersion
rust-langcargo
𝑥
< 1.96.0
𝑥
= Vulnerable software versions
Azure Linux logo
Azure Linux Releases
Azure Package
Release
rust
Azure Linux 3.0
0:1.75.0-30.azl3
fixed
Common Weakness Enumeration
References
https://blog.rust-lang.org/2026/05/25/cve-2026-5223/
https://github.com/rust-lang/cargo/pull/17031
https://groups.google.com/g/rustlang-security-announcements/c/IB74S7Yksg8