Low 2.3Published May 25, 2026

CVE-2026-5222Cargo can be coerced to share credentials between registries

Updated under an hour ago (Oct 27, 2026, 4:10 AM ET)

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It affects Rust Cargo and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Rust Cargo

Exploited in the last 30 days

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.

CVSS: 2.3 LOW (v4.0, CNA)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
Weakness (CWE): CWE-647
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: rust
NVD analysis: Analyzed
Record last updated: May 26, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Rust Cargo rust:cargo (from the name)	from 1.68.0 before 1.96.0	CNA record
rust-lang cargo rust-lang:cargo	from 1.68.0 before 1.96.0	NVD

References

References

https://groups.google.com/g/rustlang-security-announcements/c/SfUxOiIdY5s	vendor-advisory, mailing-list, third-party-advisory
https://blog.rust-lang.org/2026/05/25/cve-2026-5222/	vendor-advisory
https://github.com/rust-lang/cargo/pull/17031	patch, issue-tracking

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.