---
id: CVE-2026-101279
title: >-
  A security vulnerability has been detected in Trusted Domain Project OpenDMARC
  up to 1.4.2
summary: >-
  A security vulnerability has been detected in Trusted Domain Project OpenDMARC
  up to 1.4.2. This impacts an unknown function of the file
  libopendmarc/opendmarc_policy.c of the component DMARC Parser. The
  manipulation of the argument pct …
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L'
cwe:
  - CWE-189
  - CWE-190
vendor: Trusted Domain Project
product: OpenDMARC
affected:
  - OpenDMARC 1.4.0
  - OpenDMARC 1.4.1
  - OpenDMARC 1.4.2
published: '2026-09-29'
updated: '2026-09-29'
sourceUpdated: '2026-09-29T01:16:43.997'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-101279'
references:
  - url: 'https://vuldb.com/cve/CVE-2026-101279'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/submit/918280'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/411036'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/411036/cti'
    label: cna@vuldb.com
  - url: 'https://xuyongzhe-vt.github.io/share/dmarc-pct-integer-handling.html'
    label: cna@vuldb.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-29T01:24:51.143Z'
---

## Overview

A security vulnerability has been detected in Trusted Domain Project OpenDMARC up to 1.4.2. This impacts an unknown function of the file libopendmarc/opendmarc_policy.c of the component DMARC Parser. The manipulation of the argument pct leads to integer overflow. Remote exploitation of the attack is possible. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.