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.
problem types: Header Splitting possible with HTTP/3 Responses
affected:
{
product: Firefox
vendor: Mozilla
versions:
lessThan: 91.0.1, status: affected, version: unspecified, versionType: custom
}
{
product: Thunderbird
vendor: Mozilla
versions:
lessThan: 91.0.1, status: affected, version: unspecified, versionType: custom
}
