CVE-2026-4721 Unknown

CVE-2026-4721

SUSE Released: April 16, 2026 Updated: April 16, 2026 Restart Required

Description

CVE-2026-4721 Memory safety bugs present in Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148 and Thunderbird 148. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9. The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).

Fixed Vulnerabilities 1

CVE-2026-4721 N/A 0.0 ⚠️ KEV fixed
Mar 24, 2026

Memory safety bugs present in Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148 and Thunderbird 148. Some of these bugs showed evidence…

Quick Info

Patch ID: CVE-2026-4721
Vendor: SUSE
Severity: Unknown
CVEs Fixed: 1
Restart: Required

Vendor

SUSE

Additional Info

advisory id: CVE-2026-4721
advisory type: Security Update
cvrf filename: cvrf-CVE-2026-4721.xml

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