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.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade rustUpgrade chromium-rust | Jun 2, 2026 | May 25, 2026 |
| Amazon_linux_2023 | — | Upgrade rust-cargo-c-debugsourceUpgrade cargo-cUpgrade cargo-c-debuginfo | Jun 23, 2026 | May 25, 2026 |
| Debian | — | Upgrade rustc | Sep 21, 2026 | May 25, 2026 |
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