CVE-2026-5222
LOWDescription
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.
How to fix
TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works
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
Impact
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Exploit Intelligence
Low risk: more likely to be exploited than 39% of all known CVEs.
References
Related Vulnerabilities
Other CWE-647 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2022-43939 | High | 8.6 | 92% | KEV | Fix |
| CVE-2025-64500 | High | 7.3 | 1.3% | - | Fix |
| CVE-2026-62685 | High | 8.1 | 0.6% | - | - |
| CVE-2026-59731 | High | 8.2 | 0.5% | - | - |
| CVE-2025-47241 | Medium | 4.0 | 0.5% | - | - |
| CVE-2026-8384 | Medium | 5.3 | 0.3% | - | Fix |
Common questions
How do I fix CVE-2026-5222?
Upgrade cargo to 1.96.0 or later.
Is CVE-2026-5222 being actively exploited?
Not that we know of. CVE-2026-5222 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.48% is the estimated probability that it will be exploited in the next 30 days. That is higher than 39% of all scored CVEs.
How severe is CVE-2026-5222?
CVE-2026-5222 has a CVSS v3 base score of 6.5, rated low. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
What does CVE-2026-5222 affect?
Published advisories record a fix for cargo (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.
Embed a live status badge for CVE-2026-5222
Markdown
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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 2026-07-23.