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CVE-2026-5222

Cargo can be coerced to share credentials between registries

Published: May 25, 2026Updated: Jun 1, 2026 Sources: CVE List NVD BDUCWE-647
NVD MITRE
6.5CVSSMEDIUM
EPSS Score
0.4%
Top 69.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:HI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-647

Affected Products

CargoRust
Library
OSS Libraries / crates-io
cargorust-lang
Library
OSS Libraries / generic-library
RustThe Rust Foundation
Library
OSS Libraries / generic-library
cargoСообщество свободного программного обеспечения
On-prem
Operating Systems / linux-distro
rustoss-projectOSS Librariesaka rust
rust-langoss-projectOSS Librariesaka rust, cargo, async-h1
the rust foundationoss-projectOSS Librariesaka rust
сообщество свободного программного обеспеченияoss-projectOperating Systemsaka сообщество свободного программного обеспечения, fsf

Exploitability

Official Patch Available

References

https://groups.google.com/g/rustlang-security-announcements/c/SfUxOiIdY5s
groups.google.com
https://blog.rust-lang.org/2026/05/25/cve-2026-5222/
blog.rust-lang.org
https://github.com/rust-lang/cargo/pull/17031
github.com
and 2 more references View all →

Timeline

Published
May 25, 2026
Last Updated
Jun 1, 2026

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