The vulnerability involves incorrect boundary checks in the Layout: Tables component, which can lead to undefined behavior when rendering malformed table structures. The weakness corresponds to improper boundary checks (CWE-119).

Affected product: Mozilla Firefox. Versions before 159, and ESR versions older than 115.44 and 153.6 contain the vulnerable code. The issue resides in the table rendering path of the browser’s layout engine.

No CVSS score or EPSS value is supplied, and the vulnerability is not listed in the CISA KEV catalog, so the public exploitation likelihood is uncertain. The attack vector would involve delivering malicious HTML containing specially crafted table structures to a vulnerable browser. At this time no public exploit is documented, but the lack of a security update means the potential risk remains for systems running affected versions.