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CVE-2026-100890 Details

Description

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:5.3 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://vuldb.com/cve/CVE-2026-100890	[email protected]
https://vuldb.com/submit/917188	[email protected]
https://vuldb.com/vuln/410840	[email protected]
https://vuldb.com/vuln/410840/cti	[email protected]
https://weitongli.com/share/opendmarc-ip6-wild-pointer.html	[email protected]

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-404	Improper Resource Shutdown or Release	[email protected]
CWE-476	NULL Pointer Dereference	[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

Date	Action	Recorded By
Sep 28, 2026	CVE Modified	CISA-ADP
Sep 28, 2026	New CVE Received	[email protected]