CVE-2026-2806
Uninitialized memory in Graphics: Text in Firefox <148 and Thunderbird <148
Is CVE-2026-2806 being exploited?
Not confirmed. CVE-2026-2806 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.39% probability of exploitation in the next 30 days.
How severe is CVE-2026-2806?
CVE-2026-2806 is rated Critical with a CVSS score of 9.1. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-2806?
Yes. A fix has been recorded for CVE-2026-2806. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-2806 affect?
CVE-2026-2806 affects Firefox <148, Thunderbird <148. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-2806?
Monitor for updates; apply patch when available
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Memory corruption in text rendering; could crash or allow remote code execution via crafted content.
Patch when possible