CVE-2026-101014 Trusted Domain Project OpenDMARC DMARC Record opendmarc_util.c opendmarc_util_cleanup off-by-one
Remote attackers can trigger an off-by-one error in OpenDMARC's DMARC record parser, potentially causing crashes or arbitrary code execution.
- 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-2026-101014?
CVE-2026-101014 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 vulnerability was detected in Trusted Domain Project OpenDMARC up to 1.4.2. Affected by this vulnerability is the function opendmarc_util_cleanup in the library libopendmarc/opendmarc_util.c of the component DMARC Record Parser. Performing a manipulation results in off-by-one. The attack may be initiated remotely. The exploit is now public and may be used. The patch is named b3b1da9264bc80324094a27c71e7369bdedc62ae. To fix this issue, it is recommended to deploy a patch.
Which versions are affected by CVE-2026-101014?
How do I fix CVE-2026-101014?
No fix has been published for CVE-2026-101014 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-101014 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-101014 exists.
Sources
Also known as DEBIAN-CVE-2026-101014, GHSA-ccpv-xp3h-j99v, UBUNTU-CVE-2026-101014.