CVE-2026-5222
Medium
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.
SeverityMedium
CVSS6.5
Exploit probability—
Product
Rust-lang Cargo
PublishedMay 25, 2026
First seenMay 25, 2026
Weakness typeCWE-647CWE-647
How to fix
Update
- rust-lang cargo1.96.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| rust-lang cargo | 1.68.0 ≤ v < 1.96.0 | 1.96.0 |
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