CVE ID:	CVE-2021-29991
Description:	Firefox incorrectly accepted a newline in a HTTP/3 header, interpretting it as two separate headers. This allowed for a header splitting attack against servers using HTTP/3. This vulnerability affects Firefox < 91.0.1 and Thunderbird < 91.0.1.
Test IDs:	1.3.6.1.4.1.25623.1.0.854230   1.3.6.1.4.1.25623.1.1.4.2021.3191.1   1.3.6.1.4.1.25623.1.1.4.2022.1582.1   1.3.6.1.4.1.25623.1.0.854223   1.3.6.1.4.1.25623.1.1.4.2021.3331.1   1.3.6.1.4.1.25623.1.1.4.2022.1577.1   1.3.6.1.4.1.25623.1.0.854208   1.3.6.1.4.1.25623.1.1.12.2021.5047.1   1.3.6.1.4.1.25623.1.1.4.2021.14821.1   1.3.6.1.4.1.25623.1.1.4.2021.3451.1   1.3.6.1.4.1.25623.1.1.4.2021.14826.1   1.3.6.1.4.1.25623.1.2.1.2021.37
Cross References:	Common Vulnerability Exposure (CVE) ID: CVE-2021-29991 https://bugzilla.mozilla.org/show_bug.cgi?id=1724896 https://bugzilla.mozilla.org/show_bug.cgi?id=1724896 https://www.mozilla.org/security/advisories/mfsa2021-37/ https://www.mozilla.org/security/advisories/mfsa2021-37/