---
id: "CVE-2026-116736"
kind: "vulnerability"
aliases: ["CVE-2026-116736"]
title: "libpff: crafted PST file triggers heap out-of-bounds read"
severity: "medium"
cvss: 6.9
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["email-processing", "forensics-tools", "libpff", "package", "pst-parsing"]
not_affected_if: ["no-pst-ost-pab-parsing"]
published_at: "2026-10-26T22:16:57+00:00"
first_seen_at: "2026-10-26T22:25:34+00:00"
updated_at: "2026-10-26T22:27:46+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-116736", "first_seen_at": "2026-10-26T22:25:34+00:00"}]
---

# libpff: crafted PST file triggers heap out-of-bounds read

libpff, a library for reading Outlook PST, OST and PAB mail files, does not check a column size against the remaining buffer in libpff_table_read_values_array. A crafted mail file can make an application read adjacent heap memory into record values or crash.

_Summary, check and fix written by a model from the sources; labelled as such._

## Timeline

- 2026-10-26T22:25:34+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-116736

## From the sources

Libpff through 20260926 contains a heap out-of-bounds read vulnerability in libpff_table_read_values_array because a 7c column definition's values_array_size is not checked against remaining buffer bytes. Attackers can supply a crafted PST, OST or PAB file to make applications read adjacent heap memory into record entry values or crash.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_