CVE-2026-101279 Trusted Domain Project OpenDMARC opendmarc_policy.c integer overflow
Remote attackers can trigger an integer overflow in OpenDMARC's DMARC parser via the pct argument, potentially causing a denial of service.
- 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-2026-101279?
CVE-2026-101279 is a medium-severity vulnerability in Trusted Domain Project OpenDMARC, published on 29 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A security vulnerability has been detected in Trusted Domain Project OpenDMARC up to 1.4.2. This impacts an unknown function of the file libopendmarc/opendmarc_policy.c of the component DMARC Parser. The manipulation of the argument pct leads to integer overflow. Remote exploitation of the attack is possible. The exploit has been disclosed publicly 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-2026-101279?
How do I fix CVE-2026-101279?
No fix has been published for CVE-2026-101279 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-101279 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-101279 exists.
Sources
Also known as DEBIAN-CVE-2026-101279, GHSA-3h24-2ph8-4r6f, UBUNTU-CVE-2026-101279.