Mozilla: MediaError message property could have leaked information about cross-origin resources

When trying to load a cross-origin resource in an audio/video context a decoding error may have resulted, and the content of that error may have revealed information about the resource. This vulnerability affects Firefox 86, Thunderbird 78.8, and Firefox ESR 78.8...

UBUNTU-CVE-2018-11499

A use-after-free vulnerability exists in handleerror in sasscontext.cpp in LibSass 3.4.x and 3.5.x through 3.5.4 that could be leveraged to cause a denial of service application crash or possibly unspecified other impact...