CVE-2026-100890Trusted Domain Project OpenDMARC SPF Parser opendmarc_spf.c opendmarc_spf_ipv6_explode null pointer dereference
Updated under an hour ago ()
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It affects Trusted Domain Project OpenDMARC. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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A flaw has been found in Trusted Domain Project OpenDMARC up to 1.4.2. Affected by this vulnerability is the function opendmarc_spf_ipv6_explode in the library libopendmarc/opendmarc_spf.c of the component SPF Parser. This manipulation of the argument cp causes null pointer dereference. It is possible to initiate the attack remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
- CVSS
- 5.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:C
- Weakness (CWE)
- CWE-476, CWE-404
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulDB
- NVD analysis
- Awaiting Analysis
- Record last updated
- Sep 28, 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/410840vdb-entry, technical-description
- https://vuldb.com/vuln/410840/ctisignature, permissions-required
- https://vuldb.com/cve/CVE-2026-100890third-party-advisory
- https://vuldb.com/submit/917188third-party-advisory
- https://weitongli.com/share/opendmarc-ip6-wild-pointer.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.