Firefox ESR 153.0 Memory Corruption Vulnerability (fixed in 153.1)
CVE-2026-74988 Published on August 18, 2026
Internally found bugs fixed in Firefox ESR 153.1 and Firefox 154
Internally found bugs present in 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 and Firefox ESR 153.1.
Products Associated with CVE-2026-74988
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Affected Versions
Mozilla Firefox:- Version 153.1, <= 153.* is unaffected.
- Version 154, <= * is unaffected.