CVE-2020-11021: Actions Http-Client (NPM @actions/http-client) before version 1.0.8 can disclose Authorization headers to inco

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MEDIUM 6.3UPGRADE

CVE-2020-11021 is a medium-severity flaw (CVSS 6.3) affecting http-client. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Actions Http-Client (NPM @actions/http-client) before version 1.0.8 can disclose Authorization headers to incorrect domain in certain redirect scenarios. The conditions in which this happens are if consumers of the http-client: 1. make an http request with an authorization header 2. that request leads to a redirect (302) and 3. the redirect url redirects to another domain or hostname Then the authorization header will get passed to the other doma

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.3 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.8% (top 22%)
CISA exploited list	No
Weakness	CWE-200
Published	2020-04-29
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: http-client project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-04-29 18:15 UTCPublished CVE record published
2026-06-17 02:48 UTCUpdated Record last modified

http-client project http-client UPGRADE

Affected: < 1.0.8

Fixed in: 1.0.8

Safe to downgrade to: no unaffected older release

1. Check installed version

npm ls http-client

2. UPGRADE to 1.0.8

npm install http-client@">=1.0.8"

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-11021?

http-client: upgrade to 1.0.8. Exact commands for each OS are on this page.

Is CVE-2020-11021 being exploited?

CVE-2020-11021 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-11021 affect?

CVE-2020-11021 affects http-client. Severity is medium (CVSS 6.3). Actions Http-Client (NPM @actions/http-client) before version 1.0.8 can disclose Authorization headers to incorrect domain in certain redirect scenarios. The conditions in which this happens are if consumers of the http-client: 1. make an h

How urgent is CVE-2020-11021?

Priority 42/100. No elevated risk signals yet.

References

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