Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | < 84.0 |
| Debian | Debian Linux | 9.0 |
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1674343Issue TrackingPermissions RequiredVendor Advisory
- https://lists.debian.org/debian-lts-announce/2021/02/msg00001.htmlMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/02/msg00002.htmlMailing ListThird Party Advisory
- https://security.gentoo.org/glsa/202102-02Third Party Advisory
- https://www.debian.org/security/2021/dsa-4840Third Party Advisory
- https://www.debian.org/security/2021/dsa-4842Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-54/Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1674343Issue TrackingPermissions RequiredVendor Advisory
- https://lists.debian.org/debian-lts-announce/2021/02/msg00001.htmlMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/02/msg00002.htmlMailing ListThird Party Advisory
- https://security.gentoo.org/glsa/202102-02Third Party Advisory
- https://www.debian.org/security/2021/dsa-4840Third Party Advisory
- https://www.debian.org/security/2021/dsa-4842Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-54/Vendor Advisory
FAQ
What is CVE-2020-26976?
CVE-2020-26976 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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 n...
How severe is CVE-2020-26976?
CVE-2020-26976 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-26976?
Check the references section above for vendor advisories and patch information. Affected products include: Mozilla Firefox, Debian Debian Linux.