CVE-2026-100890

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 v3 5.3 MEDIUM
CVSS v2.0 5.0 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

5.0^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:N/C:N/I:N/A:P

Exploitability : 10.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References

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

Configurations

No configuration.

History

28 Sep 2026, 01:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-28 01:16

Updated : 2026-09-28 15:15

NVD link : CVE-2026-100890

Mitre link : CVE-2026-100890

CVE.ORG link : CVE-2026-100890

JSON object : View

Products Affected

No product.

CWE

CWE-404

Improper Resource Shutdown or Release

CWE-476

NULL Pointer Dereference

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