---
id: CVE-2026-101277
title: >-
  A security flaw has been discovered in Trusted Domain Project OpenDKIM up to
  2.11.0
summary: >-
  A security flaw has been discovered in Trusted Domain Project OpenDKIM up to
  2.11.0. The impacted element is the function dkim_process_set of the file
  dkim.c of the component Tag Tokenizer. Performing a manipulation results in
  use of les…
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-348
vendor: Trusted Domain Project
product: OpenDKIM
affected:
  - OpenDKIM 2.0
  - OpenDKIM 2.1
  - OpenDKIM 2.2
  - OpenDKIM 2.3
  - OpenDKIM 2.4
  - OpenDKIM 2.5
  - OpenDKIM 2.6
  - OpenDKIM 2.7
  - OpenDKIM 2.8
  - OpenDKIM 2.9
  - OpenDKIM 2.10
  - OpenDKIM 2.11.0
published: '2026-09-29'
updated: '2026-09-29'
sourceUpdated: '2026-09-29T00:17:03.010'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-101277'
references:
  - url: 'https://vuldb.com/cve/CVE-2026-101277'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/submit/918270'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/411034'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/411034/cti'
    label: cna@vuldb.com
  - url: 'https://xuyongzhe-vt.github.io/share/opendkim-tag-parser-desync.html'
    label: cna@vuldb.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-29T00:24:04.802Z'
---

## Overview

A security flaw has been discovered in Trusted Domain Project OpenDKIM up to 2.11.0. The impacted element is the function dkim_process_set of the file dkim.c of the component Tag Tokenizer. Performing a manipulation results in use of less trusted source. The attack may be initiated remotely. The exploit has been released to the public and may 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.