Is MUNGE a Wordle Word?

Yes. MUNGE is a valid Wordle word.

It is not on the Wordle answer list, so it is unlikely to be a daily answer.

What does MUNGE mean?

/mʌnd͡ʒ/

To transform data in an undefined or unexplained manner.
To add a spamblock to (an email address).
(genealogy) To corrupt a record about an individual by erroneously merging in information about another individual.“It looks like this record is munged—it has this person's birth date, but his father's death date”

Definition from Wiktionary, available under the CC BY-SA license.

Starter word rating: WeakIn the top 57% of all valid Wordle words for testing common letters.
Vowels: U, E
Unique letters: 5 of 5
Common letters: E

Hard-mode trap: 6 valid words fit the pattern MUNG_. If you reach it, you may need several guesses to find the last letter.

Letter ratings use how often each letter appears in Wordle answers.

Tap its tiles to the colours Wordle showed, and the Wordle Solver lists every word that still fits, with the best next guess.