Is CVE-2026-5222 in the CISA KEV catalog?

No. CVE-2026-5222 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-5222?

CVE-2026-5222 has a CVSS v3 base score of 6.5 (Low).

What is the EPSS score for CVE-2026-5222?

CVE-2026-5222 has an EPSS score of 0.33% (25th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-5222?

Upgrade cargo to 1.96.0 or later.

CVE & CISA-KEV Catalog

CVE-2026-5222

LOW

6.5

CVSS v3

NVD

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.

CWE-647

How to fix

Remediation Available

cargoNVD

Affected:>= 1.68.0, < 1.96.0Fixed in:1.96.0CVE-2026-5222derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Exploit Intelligence

0.33%probability of exploitation in 30 days

25thpercentile

Low risk: more likely to be exploited than 25% of all known CVEs.

References

Patch1

github.com

Vendor Advisory1

blog.rust-lang.org

Third-Party Advisory1

groups.google.com

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-01.