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TI-2026-04563 Aliases CVE-2026-5223GHSA-jq42-7mfv-hm57

Crates in third party registries can override the cached source of other crates

Priority LOW 29CWE-61Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
None · Low · None
Fix status
Partial Red Hat: 1 fixed, 1 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA, GitHub and Red Hat.

Summary

Cargo incorrectly handled symlinks inside of crate tarballs downloaded from third-party registries, allowing a malicious crate to override the source code of another crate from the same registry. The severity of the vulnerability is **medium** for users of third-party registries. Users of crates.io are **not affected**, as crates.io forbids uploading crates containing any symlink.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00294 22nd percentileScored 2026-11-07
Fix Partial Cargo (Rust Project): 1.96.0cargo (crates.io): 0.97.0Red Hat: 1 advisoryRed Hat: 1 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Rust ProjectCargo1.0.0 to before 1.96.01.96.0Patch availableCNA
—cargo (crates.io)before 0.97.00.97.0Patch availableGHSA-jq42-7mfv-hm57
  • Cargo VendorRust Project Affected 1.0.0 to before 1.96.0 Fixed in 1.96.0 Patch available CNA
  • cargo (crates.io) Vendor— Affected before 0.97.0 Fixed in 0.97.0 Patch available GHSA-jq42-7mfv-hm57

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:rust-lang:cargo:*:*:*:*:*:rust:*:*before 1.96.0Vulnerablerust-lang
  • cpe:2.3:a:rust-lang:cargo:*:*:*:*:*:rust:*:* Versions before 1.96.0 Vulnerable ·rust-lang

Remediation

  • Fix · CNA Cargo (Rust Project) Fixed in 1.96.0
  • Fix · GHSA-jq42-7mfv-hm57 cargo (crates.io) Fixed in 0.97.0 Advisory →

Red Hat 1 advisory

  • RHSA-2026:42923 Released 2026-07-21 · Red Hat rating Moderate
    Red Hat Hardened Images RPMs Security Update
    • Red Hat Hardened Images cargo-1.97.1-1.1.hum1@aarch64, cargo-1.97.1-1.1.hum1@x86_64, clippy-1.97.1-1.1.hum1@aarch64 +36

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 9AffectedNo fix yet: Fix deferred
Red Hat Hardened ImagesFixed RHSA-2026:42923

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-5223
  2. 2026-10-03 Alias added: GHSA-jq42-7mfv-hm57

References

Patch 1

Advisory 3

Other 3

  • TI-2025-10287 Rust standard library didn't detect all path separators on Cygwin CVSS 4.0MEDIUM 6.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences