High 7.3Published Sep 28, 2026

CVE-2026-101014Trusted Domain Project OpenDMARC DMARC Record opendmarc_util.c opendmarc_util_cleanup off-by-one

Updated under an hour ago (2026-10-19 06:10 UTC)

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It affects Trusted Domain Project OpenDMARC. Add what you run to find out whether that includes you.

EPSS puts the chance of exploitation in the next 30 days at 0.31%, higher than 22% of scored CVEs.

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Every CVE for Trusted Domain Project OpenDMARC

Exploited in the last 30 days

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.

CVSS: 7.3 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C
Weakness (CWE): CWE-193, CWE-189
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 0.31% (percentile 22)
Assigned by: VulDB
NVD analysis: Awaiting Analysis
Record last updated: Sep 28, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Trusted Domain Project OpenDMARC trusted_domain_project:opendmarc	1.4.0; 1.4.1; 1.4.2	CNA record

References

https://vuldb.com/vuln/410884vdb-entry, technical-description
https://vuldb.com/vuln/410884/ctisignature, permissions-required
https://vuldb.com/cve/CVE-2026-101014third-party-advisory
https://vuldb.com/submit/917100third-party-advisory
https://github.com/trusteddomainproject/OpenDMARC/pull/188issue-tracking, patch
https://github.com/trusteddomainproject/OpenDMARC/pull/344issue-tracking, patch
https://weitongli.com/share/opendmarc-cleanup-off-by-one.htmlexploit
https://github.com/trusteddomainproject/OpenDMARC/commit/b3b1da9264bc80324094a27c71e7369bdedc62aepatch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.