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CVE-2026-8947

Last refreshed2026-10-15

Status: UPDATED  |  Advisory ID: CVE-2026-8947

Key Details

CVECVE-2026-8947
CVSS Score / Version
7.3 (High) / CVSS v3.1
Updated2026-10-14
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
CVSS Prose
attack vector is network; attack complexity is low; privileges required is none; user interaction is none; scope is unchanged; confidentiality impact is low; integrity impact is low; availability impact is low.
Affected products
see table below
Classified as
CWE-416 (Use After Free)

Affected Products, Subsystems & Sectors

VendorProductAffected VersionsPatch Status
Red HatRed Hat Enterprise Linux 10
Red HatRed Hat Enterprise Linux 10.0 Extended Update Support
Red HatRed Hat Enterprise Linux 8
Red HatRed Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
Red HatRed Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
Red HatRed Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
Red HatRed Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On
Red HatRed Hat Enterprise Linux 8.8 Telecommunications Update Service
Red HatRed Hat Enterprise Linux 8.8 Update Services for SAP Solutions
Red HatRed Hat Enterprise Linux 9
Red HatRed Hat Enterprise Linux 9.2 Update Services for SAP Solutions
Red HatRed Hat Enterprise Linux 9.4 Update Services for SAP Solutions
Red HatRed Hat Enterprise Linux 9.6 Extended Update Support
Red HatRed Hat Enterprise Linux 7 Extended Lifecycle Support
SubsystemsOT Supporting Infrastructure
SectorsMultiple

What to Know

Use-after-free in the DOM: Bindings (WebIDL) component. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11. (NVD)

What to Do

Monitor Red Hat's web page for any future patch releases. See vendor advisory link below.

References

SourceReference
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2026-8947
CVEhttps://www.cve.org/CVERecord?id=CVE-2026-8947
Vendor advisoryhttps://www.mozilla.org/security/advisories/mfsa2026-46/
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