RUSTSEC-2023-0064: gix-transport code execution vulnerability

What to do

1. See which version you have: cargo tree -i gix-transport (it also shows which of your dependencies pulls it in).
2. Update within your version requirement: cargo update -p gix-transport. If the fix is a newer major or minor than your requirement allows, raise it in Cargo.toml (for example gix-transport = "0.36.1") 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

The gix-transport crate prior to the patched version 0.36.1 would allow attackers to use malicious ssh clone URLs to pass arbitrary arguments to the ssh program, leading to arbitrary code execution.

PoC: gix clone 'ssh://-oProxyCommand=open$IFS-aCalculator/foo'

This will launch a calculator on OSX.

See <https://secure.phabricator.com/T12961> for more details on similar vulnerabilities in git.

Thanks to vin01 for disclosing the issue.

References

• Package: crates.io/crates/gix-transport
• Advisory: rustsec.org/advisories/RUSTSEC-2023-0064.html
• Web: github.com/Byron/gitoxide/pull/1032
• Web: secure.phabricator.com/T12961

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

Other advisories for gix-transport

• VulnerabilityRUSTSEC-2024-0335 · 2024-04-13gix-transport indirect code execution via malicious username
• VulnerabilityGHSA-9857-6mw7-fq2m · 2026-05-05gix-transport: HTTP credentials leaked to redirected host in curl backend

Full security history of gix-transport