What’s Vulnerable › Vulnerabilities

CVE-2021-38196

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-08-08 · updated 2026-06-17
• Weakness: CWE-94

Description

An issue was discovered in the better-macro crate through 2021-07-22 for Rust. It intentionally demonstrates that remote attackers can execute arbitrary code via proc-macros, and otherwise has no legitimate purpose.

Affected products

• Better-Macro Project Better-Macro: through 2021-07-22

References

• https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/better-macro/RUSTSEC-2021-0077.md
• https://rustsec.org/advisories/RUSTSEC-2021-0077.html
• https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/better-macro/RUSTSEC-2021-0077.md
• https://rustsec.org/advisories/RUSTSEC-2021-0077.html

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