CVE-2026-5223

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.

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://blog.rust-lang.org/2026/05/25/cve-2026-5223/	Mitigation Vendor Advisory
https://github.com/rust-lang/cargo/pull/17031	Issue Tracking Patch
https://groups.google.com/g/rustlang-security-announcements/c/IB74S7Yksg8	Third Party Advisory Mailing List

Configurations

Configuration 1 (hide)

cpe:2.3:a:rust-lang:cargo:*:*:*:*:*:rust:*:*

History

01 Jun 2026, 17:52

Type	Values Removed	Values Added
CPE		cpe:2.3:a:rust-lang:cargo::::::rust::*
References	~~() https://blog.rust-lang.org/2026/05/25/cve-2026-5223/ -~~	() https://blog.rust-lang.org/2026/05/25/cve-2026-5223/ - Mitigation, Vendor Advisory
References	~~() https://github.com/rust-lang/cargo/pull/17031 -~~	() https://github.com/rust-lang/cargo/pull/17031 - Issue Tracking, Patch
References	~~() https://groups.google.com/g/rustlang-security-announcements/c/IB74S7Yksg8 -~~	() https://groups.google.com/g/rustlang-security-announcements/c/IB74S7Yksg8 - Third Party Advisory, Mailing List
First Time		Rust-lang Rust-lang cargo
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 5.3

25 May 2026, 10:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-05-25 10:16

Updated : 2026-06-01 17:52

NVD link : CVE-2026-5223

Mitre link : CVE-2026-5223

CVE.ORG link : CVE-2026-5223

JSON object : View

Products Affected

rust-lang

cargo

CWE

CWE-61

UNIX Symbolic Link (Symlink) Following

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