CVE-2020-6820
CISA KEV
ACT NOW
Priority: 0.00
BB Relevance:
0/100
Published: N/A
Modified: N/A
First seen: 2026-10-29
Status: pending_score
Description
Mozilla Firefox and Thunderbird contain a race condition vulnerability when handling a ReadableStream under certain conditions. The race condition creates a use-after-free vulnerability, causing unspecified impacts.
CISA Known Exploited Vulnerability
Vendor / Product
Mozilla — Firefox and Thunderbird
Date Added
2021-11-03
Remediation Due
2022-05-03
https://nvd.nist.gov/vuln/detail/CVE-2020-6820