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CVE-2020-26976

Date: January 7, 2021

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.

Severity Score

Related Resources (13)

https://www.debian.org/security/2021/dsa-4842
https://people.canonical.com/~ubuntu-security/cve/CVE-2020-26976
https://lists.debian.org/debian-lts-announce/2021/02/msg00001.html
https://www.debian.org/security/2021/dsa-4840
https://security.gentoo.org/glsa/202102-02
https://nvd.nist.gov/vuln/detail/CVE-2020-26976
https://access.redhat.com/security/cve/CVE-2020-26976
https://bugzilla.mozilla.org/show_bug.cgi?id=1674343
https://security-tracker.debian.org/tracker/CVE-2020-26976
https://www.mozilla.org/security/advisories/mfsa2020-54/
https://security.alpinelinux.org/vuln/CVE-2020-26976
https://lists.debian.org/debian-lts-announce/2021/02/msg00002.html
https://www.mend.io/vulnerability-database/CVE-2020-26976

Severity Score

Weakness Type (CWE)

Insufficient Information

NVD-CWE-noinfo

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): REQUIRED
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): HIGH
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): MEDIUM
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): PARTIAL
Availability (A): NONE
Additional information:

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