AI Score
Confidence
Low
EPSS
Percentile
53.0%
It was discovered that Firefox could be made to incorrectly accept newlines in HTTP/3 response headers. If a user were tricked into opening a specially crafted website, an attacker could exploit this to conduct header splitting attacks.
ubuntu.com/security/CVE-2021-29991
ubuntu.com/security/notices/USN-5047-1