CVE-2026-100891Trusted Domain Project OpenDMARC Internationalized Domain Name opendmarc_policy.c opendmarc_policy_query_dmarc encoding error
Updated under an hour ago ()
Does this affect you?
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 0.29%, higher than 20% of scored CVEs.
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A vulnerability has been found in Trusted Domain Project OpenDMARC up to 1.4.2. Affected by this issue is the function opendmarc_policy_query_dmarc in the library libopendmarc/opendmarc_policy.c of the component Internationalized Domain Name Handler. Such manipulation leads to encoding error. It is possible to launch the attack remotely. 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.
- 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:X/RC:C
- Weakness (CWE)
- CWE-172
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.29% (percentile 20)
- Assigned by
- VulDB
- NVD analysis
- Awaiting Analysis
- Record last updated
- Oct 1, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
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/410841vdb-entry, technical-description
- https://vuldb.com/vuln/410841/ctisignature, permissions-required
- https://vuldb.com/cve/CVE-2026-100891third-party-advisory
- https://vuldb.com/submit/917215third-party-advisory
- https://weitongli.com/share/opendmarc-ulabel-not-converted.htmlexploit
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.