CVE-2020-6806

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CVSS 3.1

8.8 high

EPSS

3%p84

Published

Mar 25, 2020 (Mar 25, 2020)

Modified

Jun 17, 2026

Description

By carefully crafting promise resolutions, it was possible to cause an out-of-bounds read off the end of an array resized during script execution. This could have led to memory corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 68.6, Firefox < 74, Firefox < ESR68.6, and Firefox ESR < 68.6.

Vendors: mozilla canonical
Products: firefox, firefox esr, thunderbird, ubuntu linux
Weakness: CWE-125
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

NVD CVE.org GitHub PoCs EPSS (2.6%)

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