Hanafi
The sources give no view for it here.
نجاسة الصديد
هل الصديد نجس كالدم؟
Each school’s answer
In our wordsHanafi
Not stated in the sources
Maliki
Not stated in the sources
Shafi'i
Not stated in the sources
Hanbali
Not stated in the sources
The texts
حُكْمُهُ مِنْ حَيْثُ النَّجَاسَةُ وَالطَّهَارَةُ: ٣ - ذَهَبَ جُمْهُورُ الْفُقَهَاءِ: إِلَى أَنَّ الصَّدِيدَ نَجِسٌ كَالدَّمِ، لأَِنَّهُ مِنَ الْخَبَائِثِ، وَالطِّبَاعُ السَّلِيمَةُ تَسْتَخْبِثُهُ (١) .
«الموسوعة الفقهية الكويتية» (Kuwait) entry «صديد» vol. 26 p. 344
والقيح والصديد كالدم
From the schools’ own books
Maliki
The sources give no view for it here.
Shafi'i
The sources give no view for it here.
Hanbali
The sources give no view for it here.
What is «in our words» is our standard wording; the books’ texts stay as they are.