CVE-2026-101015 Trusted Domain Project OpenDMARC policy.c improper validation of unsafe equivalence in input
Remote attackers can exploit improper input validation in OpenDMARC's domain handler to bypass security checks, requiring immediate attention from mail server administrators.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-101015?
CVE-2026-101015 is a medium-severity vulnerability in Trusted Domain Project OpenDMARC, published on 28 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-101015?
How do I fix CVE-2026-101015?
No fix has been published for CVE-2026-101015 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-101015 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-101015 exists.
Sources
Also known as DEBIAN-CVE-2026-101015, GHSA-h669-gmgf-xwjw, UBUNTU-CVE-2026-101015.