CVE-2026-101015

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.

CVSS 4.0

5.5CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

CVSS 3.1

7.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

EPSS

0.3% chance of exploitation in the next 30 days; higher than 21% of CVEs (scores of 2026-10-25)

CWEs

CWE-20, CWE-1289

Published

2026-09-28

Modified

2026-10-01

Record from

the NVD, synced 2026-10-19

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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