RUSTSEC-2021-0132: Integer overflow in the bundled Brotli C library

What to do

1. See which version you have: cargo tree -i compu-brotli-sys (it also shows which of your dependencies pulls it in).
2. Update within your version requirement: cargo update -p compu-brotli-sys. If the fix is a newer major or minor than your requirement allows, raise it in Cargo.toml (for example compu-brotli-sys = "1.0.9") or update the dependency that pulls it in.
3. Check again with cargo audit, or paste your Cargo.lock into our Cargo.toml checker.

Details from the advisory

A buffer overflow exists in the Brotli library versions prior to 1.0.8 where an attacker controlling the input length of a "one-shot" decompression request to a script can trigger a crash, which happens when copying over chunks of data larger than 2 GiB.

If one cannot update the C library, its authors recommend to use the "streaming" API as opposed to the "one-shot" API, and impose chunk size limits.

References

• Package: crates.io/crates/compu-brotli-sys
• Advisory: rustsec.org/advisories/RUSTSEC-2021-0132.html
• Web: github.com/google/brotli/releases/tag/v1.0.9

From the RustSec Advisory Database (CC0-1.0) via the OSV export, downloaded Oct 24, 2026. Severity score computed from the published CVSS vector.