CVE-2026-5223

medium

Description

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.

References

Advisories
More

https://groups.google.com/g/rustlang-security-announcements/c/IB74S7Yksg8

https://blog.rust-lang.org/2026/05/25/cve-2026-5223/

https://github.com/rust-lang/cargo/pull/17031

Details

Source: Mitre, NVD

Published: 2026-05-25

Updated: 2026-05-25

Risk Information

CVSS v2

Base Score: 7.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

Severity: High

CVSS v3

Base Score: 9.1

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Severity: Critical

CVSS v4

Base Score: 6.5

Vector: 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

Severity: Medium

EPSS

EPSS: 0.00044