CVE-2026-100890

MEDIUM 5.3

Trusted Domain Project OpenDMARC SPF Parser opendmarc_spf.c opendmarc_spf_ipv6_explode null pointer dereference

CVSS Score

5.3

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-476 CWE-404
Vendor	trusted domain project
Product	opendmarc
Published	Sep 28, 2026

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CVSS v3 Breakdown

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

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

Trusted Domain Project / OpenDMARC

1.4.0 1.4.1 1.4.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vuldb.com: https://vuldb.com/vuln/410840 vuldb.com: https://vuldb.com/vuln/410840/cti vuldb.com: https://vuldb.com/cve/CVE-2026-100890 vuldb.com: https://vuldb.com/submit/917188 weitongli.com: https://weitongli.com/share/opendmarc-ip6-wild-pointer.html

Credits

🔍 WeitongLi (VulDB User) VulDB CNA Team