Vulnerability in Trusted Domain Project Opendmarc
CVE-2026-101014
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.
Published .
CVSS v3 metric
CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Trusted Domain Project Opendmarc — versions 1.4.0, 1.4.1, 1.4.2
Weakness classification (CWE)
References
- vuldb.com/vuln/410884 (technical-description, vdb-entry)
- vuldb.com/vuln/410884/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-101014 (third-party-advisory)
- vuldb.com/submit/917100 (third-party-advisory)
- github.com/trusteddomainproject/OpenDMARC/pull/188 (issue-tracking, patch)
- github.com/trusteddomainproject/OpenDMARC/pull/344 (issue-tracking, patch)
- weitongli.com/share/opendmarc-cleanup-off-by-one.html (exploit)
- github.com/trusteddomainproject/OpenDMARC/commit/b3b1da9264bc80324094a27c71e736… (patch)
Frequently asked questions
- What is CVE-2026-101014?
- CVE-2026-101014 is a high-severity vulnerability in Trusted Domain Project Opendmarc, classified under CWE-189. CVSS score: 7.3/10. Published 2026-09-28.
- How severe is CVE-2026-101014?
- High severity. CVSS v3 base score is 7.3 out of 10.