CVE-2026-2769
Use-after-free in IndexedDB may lead to remote code execution in Firefox/Thunderbird.
Is CVE-2026-2769 being exploited?
Not confirmed. CVE-2026-2769 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 0.42% probability of exploitation in the next 30 days.
How severe is CVE-2026-2769?
CVE-2026-2769 is rated High with a CVSS score of 8.8. 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-2026-2769?
Yes. A fix has been recorded for CVE-2026-2769. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-2769 affect?
CVE-2026-2769 affects Firefox < 148, Firefox ESR < 115.33, Firefox ESR < 140.8, Thunderbird < 148, and 1 further product or version. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-2769?
Patch when available; enable auto-update.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
RCE via use-after-free in IndexedDB; attacker could run arbitrary code in the browser context.
Monitor only