AUGUST 4, 2026
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Case File

CVE-2020-26976

MEDIUM · CVSS 6.5 EPSS 1.56%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-01-07 · Last synced 2026-08-04

CyberRota Analysis

This is a medium severity vulnerability with a CVSS score of 6.5. It affects Firefox.

CVE
CVE-2020-26976
Severity
MEDIUM
CVSS
6.5
EPSS
1.56%
Firefox

Original NVD Description

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.

Related CVEs

Other vulnerabilities affecting the same vendor(s)