High 8.8Published Jun 24, 2025

CVE-2025-6426No warning when opening executable terminal files on macOS

Updated under an hour ago (Oct 27, 2026, 5:23 AM ET)

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It affects Mozilla Firefox and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Mozilla Firefox

Exploited in the last 30 days

The executable file warning did not warn users before opening files with the `terminal` extension. *This bug only affects Firefox for macOS. Other versions of Firefox are unaffected.*. This vulnerability was fixed in Firefox 140, Firefox ESR 128.12, Thunderbird 140, and Thunderbird 128.12.

CVSS: 8.8 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-345
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: mozilla
NVD analysis: Modified
Record last updated: Apr 13, 2026
First seen by InfoSec Signals: Oct 23, 2026

Affected products

Affected products

Mozilla Firefox mozilla:firefox (from the name)	128.12 builds before 128.* not affected; from 140 not affected	CNA record
Mozilla Thunderbird mozilla:thunderbird (from the name)	128.12 builds before 128.* not affected; from 140 not affected	CNA record
mozilla firefox mozilla:firefox	before 128.12.0; before 140.0	NVD

References

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1964385	permissions-required
https://www.mozilla.org/security/advisories/mfsa2025-51/	vendor-advisory
https://www.mozilla.org/security/advisories/mfsa2025-53/	vendor-advisory
https://www.mozilla.org/security/advisories/mfsa2025-54/
https://www.mozilla.org/security/advisories/mfsa2025-55/

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.