CVE-2026-116735: libpff through 20260926 Heap Out-of-Bounds Read via libpff_table_read_6c_record_entries
libpff through 20260926 contains an off-by-one bounds check in libpfftableread6crecordentries that allows attackers to trigger a heap out-of-bounds read via crafted 6c table record entries. Attackers can supply crafted PST, OST or PAB files to applications like pffexport or pypff to read adjacent heap memory or cause crashes.
Affected Software
Event History
Frequently Asked Questions
Which deployments are realistically exposed?
Applications that use libpff to parse attacker-controlled PST, OST, or PAB files are exposed. The description specifically identifies pffexport and pypff as examples.
What does an attacker need to exploit this issue?
An attacker needs to provide a crafted file containing malformed 6c table record entries and have a vulnerable application parse it. The listed vector indicates local access and user interaction are required, while no privileges are required.
What is the expected impact of successful exploitation?
Successful exploitation can cause a heap out-of-bounds read, potentially reading adjacent heap memory or causing the parsing application to crash. The provided severity vector indicates low confidentiality impact and high availability impact.