EXPOSURES › CVE-2026-5734
CVE-2026-5734
CRITICAL
DETAIL
SourceNVD · cve
Published2026-04-07
CVSS9.8
Referencehttps://nvd.nist.gov/vuln/detail/CVE-2026-5734 ↗
▸ RECOMMENDED ACTION Critical severity — schedule patching of the affected products.
PLAYERS IMPLICATED
DESCRIPTION
Memory safety bugs present in Firefox ESR 140.9.0, Thunderbird ESR 140.9.0, Firefox 149.0.1 and Thunderbird 149.0.1. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 149.0.2, Firefox ESR 140.9.1, Thunderbird 149.0.2, and Thunderbird 140.9.1.
AFFECTED FEDRAMP PRODUCTS · 0
No correlated FedRAMP products.