# CVE-2022-4899: PYSEC-2023-121 - zstd vulnerable to buffer overrun

Source: https://junglewise.ai/threats/cve-2022-4899-zstd-vulnerable-to-buffer-overrun  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2023-03-31  
License: CC BY 4.0 with a link back

CVE-2022-4899 · Severity: low · CVSS 3.1 · Published 2023-03-31

zstd vulnerable to buffer overrun

Vendors: [PyPI](https://junglewise.ai/threats/vendors/pypi), [Swift](https://junglewise.ai/threats/vendors/swifturl).

## Quick answers

**Is CVE-2022-4899 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2022-4899 being exploited in the wild.

**How severe is CVE-2022-4899?** Low severity, with a CVSS score of 3.1, published 31 March 2023.

**Which products and versions are affected?** zstd (PyPI) ECOSYSTEM:introduced=0,fixed=1.5.4, ECOSYSTEM:introduced=0,fixed=1.5.4.0; github.com/facebook/zstd (Swift) SEMVER:introduced=0,fixed=1.5.4.

**Is there a fix for CVE-2022-4899?** Yes. zstd (PyPI): upgrade to 1.5.4, 1.5.4.0 or later; github.com/facebook/zstd (Swift): upgrade to 1.5.4 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2022-4899?** Check whether you run zstd (PyPI) or github.com/facebook/zstd (Swift) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- zstd (PyPI): upgrade to 1.5.4, 1.5.4.0 or later

  ```sh
  pip install "zstd>=1.5.4.0"
  ```

- github.com/facebook/zstd (Swift): upgrade to 1.5.4 or later

## Affected products

- zstd (PyPI) ECOSYSTEM:introduced=0,fixed=1.5.4, ECOSYSTEM:introduced=0,fixed=1.5.4.0
- github.com/facebook/zstd (Swift) SEMVER:introduced=0,fixed=1.5.4

## Identifiers

- CVE-2022-4899
- GHSA-5c9c-6x87-f9vm
- PYSEC-2023-121