CVE-2026-74987

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Open

TLP:CLEAR

Internally found bugs fixed in Firefox ESR 140.14, Firefox ESR 153.1 and Firefox 154

NVD CVE.org

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Description

Internally found bugs present in Firefox ESR 140.13, Firefox ESR 153.0 and Firefox 153. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, and Firefox ESR 153.1.

Details

Confidence: 90%
Published: Aug 18, 2026
Last Modified: Aug 18, 2026

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