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CVE-2026-0879

Published: Jan 13, 2026

Modified: Apr 13, 2026

PUBLISHED

Description

Sandbox escape due to incorrect boundary conditions in the Graphics component. This vulnerability was fixed in Firefox 147, Firefox ESR 115.32, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7.

Vendor	Product	Versions
Mozilla	Firefox	unaffected `115.32 - <= 115.` unaffected `140.7 - <= 140.` unaffected `147 - <= *`
Mozilla	Thunderbird	unaffected `140.7 - <= 140.` unaffected `147 - <= `

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2004602

https://www.mozilla.org/security/advisories/mfsa2026-01/

https://www.mozilla.org/security/advisories/mfsa2026-02/

https://www.mozilla.org/security/advisories/mfsa2026-03/

https://www.mozilla.org/security/advisories/mfsa2026-04/

https://www.mozilla.org/security/advisories/mfsa2026-05/

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