Cargo between 1.68 and 1.96 incorrectly normalized the URLs of third-party registries using the sparse index protocol. If a hosting provider allowed multiple registries to be hosted with arbitrary names within the same domain, an attacker able to publish crates in a registry could obtain the credentials of others users of the same registry. The severity of the vulnerability is **low**, due to the extremely niche requirements needed to achieve the attack.
History

Mon, 01 Jun 2026 18:00:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:rust-lang:cargo:*:*:*:*:*:rust:*:*
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'}


Tue, 26 May 2026 15:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 25 May 2026 11:45:00 +0000

Type Values Removed Values Added
First Time appeared Rust-lang
Rust-lang cargo
Vendors & Products Rust-lang
Rust-lang cargo

Mon, 25 May 2026 09:45:00 +0000

Type Values Removed Values Added
Description Cargo between 1.68 and 1.96 incorrectly normalized the URLs of third-party registries using the sparse index protocol. If a hosting provider allowed multiple registries to be hosted with arbitrary names within the same domain, an attacker able to publish crates in a registry could obtain the credentials of others users of the same registry. The severity of the vulnerability is **low**, due to the extremely niche requirements needed to achieve the attack.
Title Cargo can be coerced to share credentials between registries
Weaknesses CWE-647
References
Metrics cvssV4_0

{'score': 2.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: rust

Published: 2026-05-25T08:54:56.348Z

Updated: 2026-05-26T14:43:10.019Z

Reserved: 2026-03-31T12:07:40.168Z

Link: CVE-2026-5222

cve-icon Vulnrichment

Updated: 2026-05-26T14:43:04.959Z

cve-icon NVD

Status : Analyzed

Published: 2026-05-25T10:16:15.273

Modified: 2026-06-01T17:56:41.383

Link: CVE-2026-5222

cve-icon Redhat

No data.