CVE-2025-6426: firefox — Fix

Description

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.

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CVSS v3.1 Score

8.8

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-345 CWE-345

Affected Products

Vendor	Product	Versions
mozilla	firefox	< 128.12.0
mozilla	firefox	< 140.0
apple	macos	All

References

Advisories & Patches

https://www.mozilla.org/security/advisories/mfsa2025-51/ https://www.mozilla.org/security/advisories/mfsa2025-53/

Other References

https://bugzilla.mozilla.org/show_bug.cgi?id=1964385 https://www.mozilla.org/security/advisories/mfsa2025-54/ https://www.mozilla.org/security/advisories/mfsa2025-55/

Frequently Asked Questions

What is CVE-2025-6426? +

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. It has a CVSS v3.1 base score of 8.8 (HIGH).

How severe is CVE-2025-6426? +

CVE-2025-6426 has a CVSS v3.1 score of 8.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-6426? +

CVE-2025-6426 affects products from apple, mozilla, specifically: firefox, macos. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-6426? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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