---
id: "CVE-2026-111678"
kind: "vulnerability"
aliases: ["CVE-2026-111678"]
title: "Antiword: crafted .doc file reads past stack buffer, crashing parser"
severity: "medium"
cvss: 4.8
epss: null
exploited: false
status: "open"
category: "package"
products: [{"name": "antiword project antiword", "fixed": [], "affected": "<= 0.37", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["antiword", "document-conversion", "linux", "package"]
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: "2026-10-25T04:33:37+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-111678", "first_seen_at": "2026-10-23T21:57:13+00:00"}]
---

# Antiword: crafted .doc file reads past stack buffer, crashing parser

Antiword through 0.37 has a stack out-of-bounds read in the Word 8 property parsing code (vGet8PapInfo and vGet8ChrInfo in prop8.c) because FKP run counts and grpprl offsets are not bounded. An attacker who supplies a crafted .doc file can crash antiword or corrupt style parsing.

_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 releases are `0.37` and earlier.
- unknown whether any other check applies.

## Fix

- Move antiword to a release newer than `0.37` once a fixed version is published; the sources do not name one.
- Until patched, do not run antiword on untrusted .doc files.

## Timeline

- 2026-10-23T21:57:13+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-111678

## From the sources

Antiword through 0.37 contains a stack out-of-bounds read vulnerability in vGet8PapInfo and vGet8ChrInfo in prop8.c because FKP run counts and grpprl offsets are not bounded. Attackers can supply a crafted .doc file with malicious FKP pages to read past the 512-byte stack buffer, crashing antiword or corrupting style parsing.

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