Improper Handling of Exceptional Conditions in Trusted Domain Project OpenDMARC
CVE-2026-101017

6.9MEDIUM

Key Information:

Vendor

Trusted Domain Project

Status
Opendmarc
Vendor
CVE Published:
28 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-101017?

A vulnerability in Trusted Domain Project OpenDMARC versions up to 1.4.2 involves improper handling of exceptional conditions within the strcasecmp function in the library libopendmarc/opendmarc_policy.c. This flaw allows for potential remote exploitation, as the exploit has been made public. The vendor was notified of this vulnerability but has not provided a response.

Affected Version(s)

OpenDMARC 1.4.0

OpenDMARC 1.4.1

OpenDMARC 1.4.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-101017 - Proof of Concept

References

https://vuldb.com/vuln/410887
vdb-entrytechnical-description
https://vuldb.com/vuln/410887/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-101017
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

yongzhe_xu (VulDB User)
VulDB CNA Team
.