# https-proxy-agent denial of service

Source: https://junglewise.ai/threats/https-proxy-agent-denial-of-service-14e827ec  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2020-08-19. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

Severity: info · Published 2020-08-19

https-proxy-agent is a Node.js library used to route HTTP and HTTPS traffic through proxy servers. A denial of service vulnerability allows attackers to cause the library to crash or hang, potentially disrupting applications that depend on it for proxy functionality.

Technologies: [https-proxy-agent (npm)](https://junglewise.ai/threats/technologies/https-proxy-agent). Vendors: [npm](https://junglewise.ai/threats/vendors/npm).

## Quick answers

**Is This vulnerability exploited in the wild?** No. Junglewise Threat Intelligence has no report of This vulnerability being exploited in the wild.

**How severe is This vulnerability?** Informational severity, published 19 August 2020.

**Which products and versions are affected?** https-proxy-agent (npm) < 2.2.0.

**Is there a fix for This vulnerability?** A patch was published on 2020-08-19: Fixed in version 2.2.0 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is This vulnerability attacked?** It is attacked over the network, in a software library.

**Am I affected?** Check whether you run https-proxy-agent (npm) 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.

## Technical details

The vulnerability is a denial of service (CWE unspecified) in https-proxy-agent affecting all versions prior to 2.2.0. The exact root cause and attack vector details are not available in the provided advisory, but the vulnerability was reported to HackerOne and subsequently fixed in version 2.2.0. The vulnerability is a duplicate of GHSA-8g7p-74h8-hg48, suggesting there may be multiple related DoS issues in the proxy agent implementation.

## Affected products

- npm https-proxy-agent < 2.2.0

## Timeline

- 2020-08-19: disclosed
- 2020-08-19: patched: Fixed in version 2.2.0

## References

- [https://hackerone.com/reports/319532](https://hackerone.com/reports/319532)

## Related threats

- [https-proxy-agent man-in-the-middle via improper TLS enforcement](https://junglewise.ai/threats/https-proxy-agent-man-in-the-middle-via-improper-tls-enforcement-39e8db63)
- [https-proxy-agent denial of service via unsanitized proxy options](https://junglewise.ai/threats/cve-2018-3739-https-proxy-agent-denial-of-service-via-unsanitized-proxy-options)