CVE-2026-5222 — Cargo can be coerced to share credentials between registries
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 ho…
Published: 2026-05-25 · CVSS: 2.3 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7