Vulnerability in Libyal Libpff
CVE-2026-116735
libpff through 20260926 contains an off-by-one bounds check in libpff_table_read_6c_record_entries 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.
Published .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/libyal/libpff/issues/172 (issue-tracking)
- github.com/libyal/libpff (product)
- github.com/libyal/libpff/commit/cb83eb38ffdbdfe2c69238fe7ce481ddc8513266 (patch)
- github.com/libyal/libpff/blob/20260926/libpff/libpff_table.c (technical-description)
- hackmd.io/@haindpwn/libpff-table-parsing-oob-reads (third-party-advisory)
- www.vulncheck.com/advisories/libpff-through-20260926-heap-out-of-bounds-read-vi… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-116735?
- CVE-2026-116735 is a medium-severity vulnerability in Libyal Libpff, classified under Off-by-one Error. CVSS score: 6.1/10. Published 2026-10-26.
- How severe is CVE-2026-116735?
- Medium severity. CVSS v3 base score is 6.1 out of 10.