Vulnerability-Lookup

CVE-2026-5222 (GCVE-0-2026-5222)

Vulnerability from cvelistv5 – Published: 2026-05-25 08:54 – Updated: 2026-05-26 14:43

Title

Cargo can be coerced to share credentials between registries

Summary

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.

Severity

2.3 (Low)


                        
                          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

CWE

CWE-647 - Use of Non-Canonical URL paths for authorization decisions

Assigner

rust

References

3 references

URL	Tags
https://groups.google.com/g/rustlang-security-ann…	vendor-advisorymailing-list
https://blog.rust-lang.org/2026/05/25/cve-2026-5222/	vendor-advisory
https://github.com/rust-lang/cargo/pull/17031	patch

Impacted products

1 product

Vendor	Product	Version
Rust	Cargo	Affected: 1.68.0 , < 1.96.0 (semver)

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-5222

Vulnerability from fkie_nvd - Published: 2026-05-25 10:16 - Updated: 2026-05-26 19:08

Severity

2.3 (Low) - 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

Summary

References

	URL	Tags
	986d4109-89ea-491f-99fd-a8e4803919bd	https://blog.rust-lang.org/2026/05/25/cve-2026-5222/
	986d4109-89ea-491f-99fd-a8e4803919bd	https://github.com/rust-lang/cargo/pull/17031
	986d4109-89ea-491f-99fd-a8e4803919bd	https://groups.google.com/g/rustlang-security-announcements/c/SfUxOiIdY5s

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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MSRC_CVE-2026-5222

Vulnerability from csaf_microsoft - Published: 2026-05-02 00:00 - Updated: 2026-05-27 01:18

Summary

Cargo can be coerced to share credentials between registries

Notes

Additional Resources: To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle

Disclaimer: The information provided in the Microsoft Knowledge Base is provided \"as is\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.

CVE-2026-5222

CWE-647 - Use of Non-Canonical URL Paths for Authorization Decisions

Affected products

Under investigation 2 products

Product	Identifier	Version	Remediation
Unresolved product id: 17084-2		—
Unresolved product id: 17084-1		—

References

4 references

URL	Category
https://msrc.microsoft.com/csaf/vex/2026/msrc_cve…	self
https://support.microsoft.com/lifecycle	external
https://www.first.org/cvss	external
https://msrc.microsoft.com/csaf/vex/2026/msrc_cve…	self

JSON

To clipboard

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            ],
            "category": "product_name",
            "name": "Azure Linux"
          }
        ],
        "category": "vendor",
        "name": "Microsoft"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-5222",
      "cwe": {
        "id": "CWE-647",
        "name": "Use of Non-Canonical URL Paths for Authorization Decisions"
      },
      "notes": [
        {
          "category": "general",
          "text": "rust",
          "title": "Assigning CNA"
        }
      ],
      "product_status": {
        "under_investigation": [
          "17084-2",
          "17084-1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-5222 Cargo can be coerced to share credentials between registries - VEX",
          "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-5222.json"
        }
      ],
      "title": "Cargo can be coerced to share credentials between registries"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2026-5222 (GCVE-0-2026-5222)

FKIE_CVE-2026-5222

MSRC_CVE-2026-5222

Tags

Sightings

Nomenclature