Is it permissible for a woman to seek divorce, and is the marriage valid or void, if she discovers after marriage that her husband was committing harmful acts against others, and that if she had known this beforehand, she would have refused to marry him?

A woman is legally forbidden from seeking divorce from her husband without a legitimate شرعي (Sharia-compliant) reason. The marriage must fulfill the conditions for its validity and remains valid until its nullification is proven. Harmful actions that have not been specified cannot be ruled upon, and not every defect requires disclosure. If the husband's actions are objectionable, he should be advised and called to repentance.