CVE-2026-5222

low

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.

References

Advisories
More

https://groups.google.com/g/rustlang-security-announcements/c/SfUxOiIdY5s

https://blog.rust-lang.org/2026/05/25/cve-2026-5222/

https://github.com/rust-lang/cargo/pull/17031

Details

Source: Mitre, NVD

Published: 2026-05-25

Updated: 2026-05-25

Risk Information

CVSS v2

Base Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N

Severity: Medium

CVSS v3

Base Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Severity: Medium

CVSS v4

Base 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

Severity: Low

EPSS

EPSS: 0.00039