Integer Overflow Vulnerability in Trusted Domain Project OpenDMARC
CVE-2026-101279

6.9MEDIUM

Key Information:

Vendor

Trusted Domain Project

Status
Opendmarc
Vendor
CVE Published:
29 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-101279?

A security vulnerability has been identified in the Trusted Domain Project OpenDMARC, specifically within the DMARC Parser component. This vulnerability affects the function located in libopendmarc/opendmarc_policy.c, where manipulation of the argument 'pct' can lead to an integer overflow. This issue allows remote exploitation, raising significant security concerns. Although the vendor was informed about the vulnerability, there has been no response regarding mitigation or patching efforts. Public disclosures of the exploit may put systems at risk.

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-2026-101279 - Proof of Concept

References

https://vuldb.com/vuln/411036
vdb-entrytechnical-description
https://vuldb.com/vuln/411036/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-101279
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
.