CVE-2026-5222Network attack vector

Registry credential disclosure via sparse URL normalization

Published May 25, 2026 · Updated May 25, 2026

Credential disclosure in Rust Cargo 1.68.0 through 1.95.0 allows remote attackers to obtain registry tokens via a crafted sparse index. Registry URL normalization strips the .git suffix from sparse HTTPS URLs, conflating distinct registry identities and reusing credentials. Exploitation requires attacker publication rights, control of the corresponding .git path, permissive cross-registry dependencies, and a victim downloading the crafted crate.

CVSS severity2.3
Low
EPSS probability0.48%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Credential disclosure in Rust Cargo 1.68.0 through 1.95.0 allows remote attackers to obtain registry tokens via a crafted sparse index. Registry URL normalization strips the .git suffix from sparse HTTPS URLs, conflating distinct registry identities and reusing credentials. Exploitation requires attacker publication rights, control of the corresponding .git path, permissive cross-registry dependencies, and a victim downloading the crafted crate.

The record

CVE
CVE-2026-5222
Published
May 25, 2026
Updated
May 25, 2026
Vendor
Rust
Product
Cargo
Classifications
CWE-647, T1195.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 25, 2026CVE publishedPublication date reported by the CVE source.
  2. May 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.68.0 <1.96.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Rust · Cargoversion=1.68.0 <1.96.0

Published CVSS scores

2.3RustCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-647Use of Non-Canonical URL Paths for Authorization Decisions
T1195.001Compromise Software Dependencies and Development Tools

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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