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

Quick assessment

Affected
Rust Cargo
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Cargo是The Rust Programming Language开源的一个 Rust 包管理器。 Cargo 1.68版本至1.96版本存在安全漏洞，该漏洞源于错误规范化使用稀疏索引协议的第三方注册表URL，如果托管提供商允许在同一域内托管多个具有任意名称的注册表，能够发布crates的攻击者可能获取同一注册表其他用户的凭据。

AI Predicted 2.4 Difficulty: Hard EPSS 0.50% · P40

Possible ATT&CK Techniques 1 AI

T1110.004 · Credential Stuffing

Affected Version Matrix 1

VendorProduct Version RangeStatus
Rust Cargo 1.68.0< 1.96.0 affected
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I. Basic Information for CVE-2026-5222

Vulnerability Information
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Vulnerability Title
Cargo can be coerced to share credentials between registries
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
使用未经净化的URL路径进行授权决策
Source: CVE Program / CVE List V5
Vulnerability Title
Cargo 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cargo是The Rust Programming Language开源的一个 Rust 包管理器。 Cargo 1.68版本至1.96版本存在安全漏洞，该漏洞源于错误规范化使用稀疏索引协议的第三方注册表URL，如果托管提供商允许在同一域内托管多个具有任意名称的注册表，能够发布crates的攻击者可能获取同一注册表其他用户的凭据。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Rust Cargo 1.68.0 ~ 1.96.0 -

II. Public POCs for CVE-2026-5222

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III. Intelligence Information for CVE-2026-5222

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Patches & Fixes for CVE-2026-5222 (1)

Security Blog Posts for CVE-2026-5222 (1)

Other References for CVE-2026-5222 (1)

IV. Related Vulnerabilities

Same product: Cargo
Same vendor: Rust
Same weakness: CWE-647

V. Comments for CVE-2026-5222

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