CVE-2026-101015: Trusted Domain Project OpenDMARC policy.c improper validation of unsafe equivalence in input

Severity: high (CVSS 7.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-28 · updated 2026-10-01
Weakness: CWE-20

Description

A flaw has been found in Trusted Domain Project OpenDMARC up to 1.4.2. Affected by this issue is some unknown functionality of the file policy.c of the component Domain Handler. Executing a manipulation can lead to improper validation of unsafe equivalence in input. The attack may be launched remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Affected products

Trusted Domain Project OpenDMARC: 1.4.0, 1.4.1, 1.4.2

References

https://vuldb.com/cve/CVE-2026-101015
https://vuldb.com/submit/917216
https://vuldb.com/vuln/410885
https://vuldb.com/vuln/410885/cti
https://weitongli.com/share/opendmarc-unicode-dot-bypass.html

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