---
id: CVE-2026-101017
title: A vulnerability was found in Trusted Domain Project OpenDMARC up to 1.4.2
summary: >-
  A vulnerability was found in Trusted Domain Project OpenDMARC up to 1.4.2.
  This vulnerability affects the function strcasecmp in the library
  libopendmarc/opendmarc_policy.c. The manipulation results in handling of
  exceptional conditions.…
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-755
vendor: Trusted Domain Project
product: OpenDMARC
affected:
  - OpenDMARC 1.4.0
  - OpenDMARC 1.4.1
  - OpenDMARC 1.4.2
published: '2026-09-28'
updated: '2026-09-28'
sourceUpdated: '2026-09-28T09:17:05.503'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-101017'
references:
  - url: 'https://vuldb.com/cve/CVE-2026-101017'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/submit/918247'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/410887'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/410887/cti'
    label: cna@vuldb.com
  - url: 'https://xuyongzhe-vt.github.io/share/opendmarc-subdomain-walk-abort.html'
    label: cna@vuldb.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-28T10:07:17.780Z'
---

## Overview

A vulnerability was found in Trusted Domain Project OpenDMARC up to 1.4.2. This vulnerability affects the function strcasecmp in the library libopendmarc/opendmarc_policy.c. The manipulation results in handling of exceptional conditions. The attack can be executed remotely. The exploit has been made public and could 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.