CVE-2020-26976 Affecting mozilla package, versions [,84.0)


Severity

Recommended
0.0
medium
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.46% (76th percentile)

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  • Snyk IDSNYK-UNMANAGED-MOZILLA-2377404
  • published26 Jan 2022
  • disclosed7 Jan 2021
  • creditUnknown

Introduced: 7 Jan 2021

CVE-2020-26976  (opens in a new tab)

How to fix?

Upgrade mozilla to version 84.0 or higher.

Overview

When a HTTPS pages was embedded in a HTTP page, and there was a service worker registered for the former, the service worker could have intercepted the request for the secure page despite the iframe not being a secure context due to the (insecure) framing. This vulnerability affects Firefox < 84.

CVSS Scores

version 3.1