CVE-2026-101016 Trusted Domain Project OpenDMARC opendmarc_policy.c opendmarc_policy_parse_dmarc exceptional condition
Remote attackers can cause a denial of service in OpenDMARC by manipulating specific DMARC policy arguments, leading to exceptional condition handling.
- 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-2026-101016?
CVE-2026-101016 is a medium-severity denial of service 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 vulnerability has been found in Trusted Domain Project OpenDMARC up to 1.4.2. This affects the function opendmarc_policy_parse_dmarc in the library libopendmarc/opendmarc_policy.c. The manipulation of the argument fo/rf/ri/pct/sp/adkim/aspf/rua/ruf leads to handling of exceptional conditions. Remote exploitation of the attack is possible. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Weakness: CWE-755
Which versions are affected by CVE-2026-101016?
How do I fix CVE-2026-101016?
No fix has been published for CVE-2026-101016 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-101016 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-101016 exists.
Sources
Also known as DEBIAN-CVE-2026-101016, GHSA-qr8p-83rg-g68h, UBUNTU-CVE-2026-101016.