Rust Cargo CVE-2026-5222
LOWCVSS VectorNVD
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
4DescriptionNVD
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.
AnalysisAI
Credential leakage in Cargo's sparse index registry URL normalization affects all Cargo releases from 1.68 through 1.96. The flaw caused Cargo to incorrectly apply git-registry canonicalization rules - specifically, stripping .git suffixes and lowercasing GitHub paths - to sparse index protocol URLs (prefixed with sparse+). …
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External POC / Exploit Code
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