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CVE-2020-26976 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:6.5 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://bugzilla.mozilla.org/show_bug.cgi?id=1674343	CVE	Issue TrackingPermissions RequiredVendor Advisory
https://lists.debian.org/debian-lts-announce/2021/02/msg00001.html	CVE	Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2021/02/msg00002.html	CVE	Mailing ListThird Party Advisory
https://security.gentoo.org/glsa/202102-02	CVE	Third Party Advisory
https://www.debian.org/security/2021/dsa-4840	CVE	Third Party Advisory
https://www.debian.org/security/2021/dsa-4842	CVE	Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2020-54/	CVE	Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1674343	[email protected]	Issue TrackingPermissions RequiredVendor Advisory
https://lists.debian.org/debian-lts-announce/2021/02/msg00001.html	[email protected]	Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2021/02/msg00002.html	[email protected]	Mailing ListThird Party Advisory
https://security.gentoo.org/glsa/202102-02	[email protected]	Third Party Advisory
https://www.debian.org/security/2021/dsa-4840	[email protected]	Third Party Advisory
https://www.debian.org/security/2021/dsa-4842	[email protected]	Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2020-54/	[email protected]	Vendor Advisory

see all 14 references

Weakness Enumeration

CWE-ID	CWE Name	Source
NVD-CWE-noinfo	Insufficient Information to Classify Weakness	[email protected]

Affected Products

Product	Versions
mozilla firefox	< 84.0
CPE cpe:2.3:a:mozilla:firefox:::::::: Remediation No remediation found in references.
debian debian linux	9.0 10.0
CPE cpe:2.3:o:debian:debian_linux:9.0:::::::* cpe:2.3:o:debian:debian_linux:10.0:::::::* Remediation No remediation found in references.

Change History

10 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
Feb 15, 2021	Modified Analysis	[email protected]
Feb 2, 2021	CVE Modified	[email protected]
Feb 1, 2021	CVE Modified	[email protected]
Feb 1, 2021	CVE Modified	[email protected]
Jan 28, 2021	Modified Analysis	[email protected]
Jan 28, 2021	CVE Modified	[email protected]
Jan 12, 2021	Initial Analysis	[email protected]