---
id: CVE-2026-101278
title: A weakness has been identified in Trusted Domain Project OpenDMARC up to 1.4.2
summary: >-
  A weakness has been identified in Trusted Domain Project OpenDMARC up to
  1.4.2. This affects the function opendmarc_get_tld of the file
  libopendmarc/opendmarc_tld.c : of the component PSL Wildcard Handler.
  Executing a manipulation can le…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N'
cwe:
  - CWE-345
  - CWE-346
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: '2026-09-29T01:16:43.787'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-101278'
references:
  - url: 'https://vuldb.com/cve/CVE-2026-101278'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/submit/918273'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/411035'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/411035/cti'
    label: cna@vuldb.com
  - url: 'https://xuyongzhe-vt.github.io/share/opendmarc-psl-wildcard-orgdomain.html'
    label: cna@vuldb.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-29T01:24:51.142Z'
---

## Overview

A weakness has been identified in Trusted Domain Project OpenDMARC up to 1.4.2. This affects the function opendmarc_get_tld of the file libopendmarc/opendmarc_tld.c : of the component PSL Wildcard Handler. Executing a manipulation can lead to origin validation error. The attack may be launched remotely. The exploit has been made available to the public and could be used for attacks. 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.