Paper/Archive/CVE-2026-16412

CVE-2026-16412

Mozilla Firefox — Memory safety bugs fixed in Thunderbird ESR 140.13 and Thunderbird 153

CVSS 9.8 (ADP)9.8 / 10 × 3029.4 Not in CISA KEV+300.0 EPSS percentile 49.0.490 × 209.8 No public exploit+100.0 SSVC exploitation: none+100.0

Description · from the CVE record

Memory safety bugs present in Thunderbird ESR 140.12 and Thunderbird 152. 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 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.

Affected

ProductAffectedFixed inSource

Firefoxsee advisory140.13CNA

Thunderbirdsee advisory140.13CNA

Scores by source

CISA ADP9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refbugzilla.mozilla.org/buglist.cgi?bug_id=2005113%2C2025369%2C2026301%2C2028663%2C2029761%2C2042242%2C2043271%2C2043300%2C2044612%2C2045378%2C2045406%2C2045407%2C2045616%2C2045626%2C2045730%2C2045732%2C2045769%2C2045771%2C2047957%2C2048934%2C2049818%2C2049822%2C2050151%2C2050368%2C2051653%2C2051658 refbugzilla.mozilla.org/buglist.cgi?bug_id=2043035%2C2045057%2C2045187%2C2045402%2C2045417%2C2045482%2C2045611%2C2045618%2C2045756%2C2046917%2C2047718 refbugzilla.mozilla.org/buglist.cgi?bug_id=2045413%2C2053635%2C2053637 refmozilla.org/security/advisories/mfsa2026-68 refmozilla.org/security/advisories/mfsa2026-70 refmozilla.org/security/advisories/mfsa2026-71 refmozilla.org/security/advisories/mfsa2026-72