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CVE-2025-9181

Published: Aug 19, 2025

Modified: Apr 13, 2026

PUBLISHED

Description

Uninitialized memory in the JavaScript Engine component. This vulnerability was fixed in Firefox 142, Firefox ESR 128.14, Firefox ESR 140.2, Thunderbird 142, Thunderbird 128.14, and Thunderbird 140.2.

Vendor	Product	Versions
Mozilla	Firefox	unaffected `128.14 - <= 128.` unaffected `140.2 - <= 140.` unaffected `142 - <= *`
Mozilla	Thunderbird	unaffected `128.14 - <= 128.` unaffected `140.2 - <= 140.` unaffected `142 - <= *`

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1977130

https://www.mozilla.org/security/advisories/mfsa2025-64/

https://www.mozilla.org/security/advisories/mfsa2025-66/

https://www.mozilla.org/security/advisories/mfsa2025-67/

https://www.mozilla.org/security/advisories/mfsa2025-70/

https://www.mozilla.org/security/advisories/mfsa2025-71/

https://www.mozilla.org/security/advisories/mfsa2025-72/

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