---
id: "CVE-2026-111677"
kind: "vulnerability"
aliases: ["CVE-2026-111677"]
title: "Antiword: crafted .doc file causes heap out-of-bounds read and crash"
severity: "medium"
cvss: 6.8
epss: null
exploited: false
status: "open"
category: "package"
products: [{"name": "antiword project antiword", "fixed": [], "affected": "<= 0.37", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["antiword", "document-processing", "package", "self-hosted"]
not_affected_if: ["no-untrusted-doc-input"]
published_at: "2026-10-16T18:17:50+00:00"
first_seen_at: "2026-10-23T21:57:13+00:00"
updated_at: "2026-10-25T03:45:10+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-111677", "first_seen_at": "2026-10-23T21:57:13+00:00"}]
---

# Antiword: crafted .doc file causes heap out-of-bounds read and crash

Antiword through 0.37 has an inverted bounds check in vGet8LstInfo (prop8.c) when reading the PlcfLst record count. A crafted Word 8 .doc file can make it read past a heap allocation, which crashes the process.

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

## Affected

- vendor:antiword project antiword affected <= 0.37 fixed ?

## How to check

- Run `antiword -v` or check the installed package version; affected if it is `0.37` or earlier
- Find where antiword processes untrusted .doc uploads or files from external sources

## Timeline

- 2026-10-23T21:57:13+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-111677

## From the sources

Antiword through 0.37 contains a heap out-of-bounds read vulnerability in vGet8LstInfo in prop8.c caused by an inverted bounds check on the PlcfLst record count. Attackers can supply a crafted Word 8 .doc file claiming up to 0xffff LSTF records in a tiny buffer, causing reads past the heap allocation that crash the process.

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